Latin conjugation

In linguistics and grammar, conjugation has two basic meanings. One meaning is the creation of derived forms of a verb from basic forms, or principal parts.

The second meaning of the word conjugation is a group of verbs which all have the same pattern of inflections. Thus all those Latin verbs which in the present tense have 1st singular -ō, 2nd singular -ās, and infinitive -āre are said to belong to the 1st conjugation, those with 1st singular -eō, 2nd singular -ēs and infinitive -ēre belong to the 2nd conjugation, and so on. The number of conjugations of regular verbs is usually said to be four.

The word "conjugation" comes from the Latin , a calque of the Greek (syzygia), literally "yoking together (horses into a team)".

For examples of verbs and verb groups for each inflectional class, see the Wiktionary appendix pages for first conjugation, second conjugation, third conjugation, and fourth conjugation.

Number of conjugations

The ancient Romans themselves, beginning with Varro (1st century BC), originally divided their verbs into three conjugations ( "there are three different conjugations for verbs: the first, second, and third" (Donatus), 4th century AD), according to whether the ending of the 2nd person singular had an a, an e or an i in it. However, others, such as Sacerdos (3rd century AD), Dositheus (4th century AD) and Priscian (c. 500 AD), recognised four different groups.

In modern times grammarians generally recognise four conjugations according to the ending of the active infinitive: namely -āre, -ēre, -ere, or -īre, for example: (1) "to love", (2) "to see", (3) "to rule" and "to capture", (4) "to hear". (3rd conjugation verbs ending in -iō such as are sometimes known as "mixed conjugation" since they use a mixture of 3rd and 4th conjugation endings.)

In addition to regular verbs, which belong to one or other of the four regular conjugations, there are also a few irregular verbs, which have a different pattern of endings. The most frequent of these is the verb "to be" together with its prefixed derivatives.

There also exist deponent Latin verbs, which though active in meaning have endings identical to the passive endings of ordinary verbs. Examples in the different conjugations are: (1) "to delay", (2) "to promise", (3) "to follow" and "to go back", (4) "to lie (tell a lie)". Some verbs are semi-deponent, using passive forms for the perfect tenses only.

Latin conjugation basic paradigm

Aspect →	Imperfect						Perfect
Voice →	Active			Passive			Active		Passive
Mood →	Indicative	Subjunctive	Imperative	Indicative	Subjunctive	Imperative	Indicative	Subjunctive	Indicative	Subjunctive
Past	amābam * I was loving	amārem * I might love	—	amābar * I was being loved	amārer * I might be loved	—	amāveram * I had loved	amāvissem * I would have loved	amātus eram * I had been loved	amātus essem * I might have been loved
Present	amō * I am loving * I love	amem * I may love	amā * love!	amor * I am being loved * I am loved	amer * I may be loved	amāre * be loved!	amāvī * I have loved * I loved	amāverim * I might have loved	amātus sum * I have been loved	amātus sim * I may have been loved
Future	amābō * I will love	—	amātō * you should love	amābor * I will be loved	—	amātor * you should be loved	amāverō * I will have loved	—	amātus erō * I will have been loved	—

Principal parts

A verb's full paradigm relies on multiple different stems. The present indicative active and the present infinitive are both based on the present stem.

It is not possible to infer the stems for other tenses from the present stem. This means that, although the infinitive active form normally shows the verb conjugation, knowledge of several different forms is necessary to be able to confidently produce the full range of forms for any particular verb.

In a dictionary, Latin verbs are listed with four "principal parts" (or fewer for deponent and defective verbs), which allow the student to deduce the other conjugated forms of the verbs. These are:

1. the first person singular of the present indicative active
2. the present infinitive active
3. the first person singular of the perfect indicative active
4. the supine or, in some grammars, the perfect passive participle, which uses the same stem. (Texts that list the perfect passive participle use the future active participle for intransitive verbs.) Some verbs lack this principal part altogether.

Regular conjugations

First conjugation

The first conjugation is characterized by the vowel ā and can be recognized by the -āre ending of the present active infinitive form. The infectum tenses conjugate as follows (see also their meaning):

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I love	I will love	I was loving		I may love	I might love
	I you sg. he, she, it we you pl. they
Passive		I am loved	I will be loved	I was being loved		I may be loved	I might be loved
	I you sg. he, she, it we you pl. they

* The 2nd person singular passive can be shortened to . -re was the regular form in early Latin and (except in the present indicative) in Cicero; -ris was preferred later.

In early Latin (Plautus), the 3rd singular endings -at and -et were pronounced -āt and -ēt with a long vowel.

Other forms:

• Infinitive: "to love"
• Passive infinitive: "to be loved" (in early Latin often )
• Imperative: (pl. ) "love!"
• Future imperative: (pl. ) "love! (at a future time)"
• Indirect imperative: (pl. ) "let him love!"
• Passive imperative: (pl. ) "be loved!" (usually only found in deponent verbs)
• Passive future imperative: (pl. ) "be loved! (at a future time)"
• Passive indirect imperative: (pl. ) "let him be loved!"
• Present participle: (pl. ) "loving"
• Future participle: (pl. ) "going to love"
• Gerundive: (pl. ) "needing to be loved"
• Gerund: "of loving", "by/for loving", "in order to love"

The principal parts usually adhere to one of the following patterns:

• The perfect has the suffix -āvī. The majority of first-conjugation verbs follow this pattern, which is considered to be "regular", for example:
  • , "to love";
  • , "to order";
  • , "to praise";
  • , "to deny";
  • , "to announce, report";
  • , "to beg, pray";
  • , "to prepare";
  • , "to carry";
  • , "to fight";
  • , "to think";
  • , "to ask";
  • , "to save";
  • , "to call";
• The perfect has the suffix -uī, for example:
  • , "to rub";
  • , "to cut, to divide";
  • , "to forbid, to prohibit";
• The perfect has the suffix -ī and vowel lengthening in the stem, for example:
  • , "to help, to assist";
  • , "to wash, to bathe";
• The perfect is reduplicated, for example:
  • , "to give"
  • , "to stand";

The verb "I give" is irregular in that except in the 2nd singular and imperative , the a is short, e.g. "I will give".

The a is also short in the supine and its derivatives, but the other parts of "I stand" are regular.

Deponent verbs in this conjugation all follow the pattern below, which is the passive of the first type above:

• "to think"
• "to try"
• "to hesitate"
• "to exhort"
• "to be surprised, to be amazed at"
• "to delay, stay"

Perfect tenses

The three tenses of the 1st conjugation go as in the following table:

		Indicative				Subjunctive
		Perfect	Future perfect	Pluperfect		Perfect	Pluperfect
Active		I loved	I will have loved	I had loved		I loved	I had loved
	I you sg. he, she, it we you pl. they	*
Passive		I was loved	I will have been loved	I had been loved		I was loved	I had been loved
	I you sg. he, she, it we you pl. they

In poetry (and also sometimes in prose, e.g. Livy), the 3rd person plural of the perfect indicative is often instead of . Occasionally the form is also found.

In early Latin, the future perfect indicative had a short i in , but by the time of Cicero these forms were usually pronounced with a long i, in the same way as in the perfect subjunctive. Virgil has a short i for both tenses; Horace uses both forms for both tenses; Ovid uses both forms for the future perfect, but a long i in the perfect subjunctive.

The -v- of the perfect active tenses sometimes drops out, especially in the pluperfect subjunctive: for . Forms such as and are also found.

The passive tenses also have feminine and neuter forms, e.g. "she was loved", "it was announced".

Forms made with instead of and instead of are also found, for example and so on, but these are not common in classical Latin. See Latin tenses.

For other meanings of the perfect and pluperfect subjunctive, see Latin tenses#Jussive subjunctive.

Other forms:

• Perfect infinitive active: () "to have loved"
• Perfect infinitive passive: () "to have been loved"
• Perfect participle passive: "loved (by someone)"

Second conjugation

The second conjugation is characterized by the vowel ē, and can be recognized by the -eō ending of the first person present indicative and the -ēre ending of the present active infinitive form:

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I see	I will see	I was seeing		I may see	I might see
	I you sg. he, she, it we you pl. they
Passive		I am seen	I will be seen	I was being seen		I may be seen	I might be seen
	I you sg. he, she, it we you pl. they

The passive also often means "I seem".

Other forms:

• Infinitive: "to see"
• Passive infinitive: "to be seen"
• Imperative: (pl. ) "see!"
• Future imperative: (pl. ) "see! (at a future time)"
• Passive imperative: (pl. ) "be seen!" (usually only found in deponent verbs)
• Present participle: (pl. ) "seeing"
• Future participle: (pl. ) "going to see"
• Gerundive: (pl. ) "needing to be seen"
• Gerund: "of seeing", "by /for seeing", "in order to see"

The principal parts usually adhere to one of the following patterns:

• The perfect has the suffix -uī. Verbs which follow this pattern are considered to be "regular". Examples:
  • "to owe, be obliged"
  • "to teach, to instruct"
  • "to lie (on the ground/bed)"
  • "to deserve"
  • "to mix"
  • "to warn, advise"
  • "to be harmful"
  • "to provide, show"
  • "to hold, to keep"
  • "to frighten, to deter"
  • "to fear"
  • "to be strong"
• The perfect has the suffix –ēvī. Example:
  • "to destroy"
  • "to weep"

In verbs with perfect in -vī, syncopated (i.e. abbreviated) forms are common, such as for .

• The perfect has the suffix –īvī. Example:
  • "to arouse, to stir"
• The perfect has the suffix -sī (which combines with a preceding c or g to –xī). Examples:
  • "to burn"
  • "to increase, to enlarge"
  • "to stick, to adhere, to get stuck"
  • "to order"
  • "to remain"
  • "to persuade"
  • "to laugh"
• The perfect is reduplicated with -ī. Examples:
  • "to bite"
  • "to vow, to promise"
• The perfect has suffix -ī and vowel lengthening in the stem. Examples:
  • "to be cautious"
  • "to favour"
  • "to caress, to cherish"
  • "to sit"
  • "to see"
• The perfect has suffix -ī. Examples:
  • "to reply"
  • "to hiss, to creak" (also 3rd conj.)

Deponent verbs in this conjugation are few. They mostly go like the passive of , but and have a perfect participle with ss:

• "to confess"
• "to deserve"
• "to promise"

The following are semi-deponent, that is, they are deponent only in the three perfect tenses:

• "to dare"
• "to rejoice, to be glad"
• "to be accustomed"

Third conjugation

The third conjugation has a variable short stem vowel, which may be e, i, or u in different environments. Verbs of this conjugation end in -ere in the present active infinitive. Deponent verbs have the infinitive -ī.

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I lead	I will lead	I was leading		I may lead	I might lead
	I you sg. he, she, it we you pl. they
Passive		I am led	I will be led	I was being led		I may be led	I might be led
	I you sg. he, she, it we you pl. they

The future tense in the 3rd and 4th conjugation (-am, -ēs, -et etc.) differs from that in the 1st and 2nd conjugation (-bō, -bis, -bit etc.).

Other forms:

• Infinitive: "to lead"
• Passive infinitive: "to be led" (the 3rd conjugation has no r)
• Imperative: (pl. ) "lead!"
• Future imperative: (pl. ) "lead! (at a future time)"
• Passive imperative: (pl. ) "be led!" (usually only found in deponent verbs)
• Present participle: (pl. ) "leading"
• Future participle: (pl. ) "going to lead"
• Gerundive: (pl. ) "needing to be led"
• Gerund: "of leading", "by /for leading", "in order to lead"

Four 3rd conjugation verbs usually have no ending in the imperative singular: "lead!", "say!", "bring!", "do!".

Others, like "run!", have the ending -e.

There is no regular rule for constructing the perfect stem of third-conjugation verbs, but the following patterns are used:

• The perfect has suffix -sī (-xī when c, g, or h comes at the end of the root). Examples:
  • "to pluck, to select"
  • "to yield, depart"
  • "to close"
  • "to despise, disdain, treat with contempt"
  • "to say"
  • "to divide"
  • "to lead"
  • "to bend, to twist"
  • "to wear, to bear; wage (war)"
  • "to send"
  • "to rule"
  • "to write"
  • "to cover, conceal"
  • "to drag, to pull"
  • "to live"
• The perfect is reduplicated with suffix –ī. Examples:
  • "to fall"
  • "to kill, to slay"
  • "to run, to race"
  • "to learn"
  • "to cheat"
  • "to fart"
  • "to beat, to drive away"
  • "to claim, request"
  • "to touch, to hit"
  • "to stretch"

Although "to give" is 1st conjugation, its compounds are 3rd conjugation and have internal reduplication:

• "to found"
• "to entrust, believe"
• "to surrender"
• "to destroy, lose"
• "to give back"
• "to hand over"

Likewise the compounds of have internal reduplication. Although is transitive, its compounds are intransitive:

• "to cause to stand"
• "to come to a halt"
• "to stand off"
• "to resist"

• The perfect has suffix -vī. Examples:
  • "to smear, to daub" (also 4th conj. )
  • "to seek, to attack"
  • "to look for, ask"
  • "to sow, to plant"
  • "to spread, to stretch out"
  • "to rub, to wear out"
• The perfect has suffix -ī and vowel lengthening in the stem. If the present stem has an n infix, as in and , the infix disappears in the perfect. In some cases, the long vowel in the perfect is thought to be derived from an earlier reduplicated form, e.g. . Examples:
  • "to do, to drive"
  • "to compel, gather together"
  • "to buy"
  • "to pour"
  • "to collect, to read"
  • "to leave behind"
  • "to burst"
  • "to conquer, to defeat"
• The perfect has suffix -ī only. Examples:
  • "to climb, to go up"
  • "to establish, decide, cause to stand"
  • "to defend"
  • "to drive out, expel"
  • "to strike"
  • "to fear, be apprehensive"
  • "to kill"
  • "to show"
  • "to lift, raise, remove"
  • "to turn"
  • "to visit"
• The perfect has suffix –uī. Examples:
  • "to cultivate, to till"
  • "to consult, act in the interests of"
  • "to beget, to cause"
  • "to grind"
  • "to place"
  • "to weave, to plait"
  • "to vomit"
• The present tense indicative first person singular form has suffix –scō. Examples:
  • "to grow up, to mature"
  • "to get to know, to learn"
  • "to feed upon, to feed (an animal)"
  • "to rest, keep quiet"

Deponent verbs in the 3rd conjugation include the following:

• "to embrace"
• "to enjoy" ( is occasionally found)
• "to perform, discharge, busy oneself with"
• "to glide, slip"
• "to speak"
• "to lean on; to strive" ( is occasionally found)
• "to complain"
• "to follow"
• "to use"
• "to ride"

There are also a number of 3rd conjugation deponents with the ending -scor:

• "to obtain"
• "to get angry"
• "to obtain"
• "to be born"
• "to forget"
• "to set out"
• "to avenge, take vengeance on"

Deponent in some tenses only is the following:

• "to trust"

The following is deponent only in the infectum tenses:

• "to turn back"

Third conjugation -iō verbs

Intermediate between the third and fourth conjugation are the third-conjugation verbs with suffix –iō. These resemble the fourth conjugation in some forms.

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I capture	I will capture	I was capturing		I may capture	I might capture
	I you sg. he, she, it we you pl. they
Passive		I am captured	I will be captured	I was being captured		I may be captured	I might be captured
	I you sg. he, she, it we you pl. they

Other forms:

• Infinitive: "to capture, to take"
• Passive infinitive: "to be captured" (the 3rd conjugation has no r)
• Imperative: (pl. ) "capture!"
• Future imperative: (pl. ) "capture! (at a future time)"
• Passive imperative: (pl. ) "be captured!" (usually only found in deponent verbs)
• Future passive imperative: (pl. ) "be captured! (at a future time)" (usually only found in deponent verbs)
• Present participle: (pl. ) "capturing"
• Future participle: (pl. ) "going to capture"
• Gerundive: (pl. ) "needing to be captured" ( is also sometimes found)
• Gerund: "of capturing", "by /for capturing", "in order to capture"

Some examples are:

• "to receive, accept"
• "to take, capture"
• "to watch, examine"
• "to desire, long for"
• "to do, to make"
• "to flee"
• "to throw"
• "to kill"
• "to plunder, seize"
• "to look back"

Deponent verbs in this group include:

• "to attack"
• "to go out"
• "to die"
• "to suffer, to allow"
• "to attack"
• "to go back"

Fourth conjugation

The fourth conjugation is characterized by the vowel ī and can be recognized by the -īre ending of the present active infinitive. Deponent verbs have the infinitive -īrī:

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I hear	I will hear	I was hearing		I may hear	I might hear
	I you sg. he, she, it we you pl. they
Passive		I am heard	I will be heard	I was being heard		I may be heard	I might be heard
	I you sg. he, she, it we you pl. they

Other forms:

• Infinitive: "to hear"
• Passive infinitive: "to be heard"
• Imperative: (pl. ) "hear!"
• Future imperative: (pl. ) "hear! (at a future time)"
• Passive imperative: (pl. ) "be heard!" (usually only found in deponent verbs)
• Present participle: (pl. ) "hearing"
• Future participle: (pl. ) "going to hear"
• Gerundive: (pl. ) "needing to be heard"
• Gerund: "of hearing", "by /for hearing", "in order to hear"

Principal parts of verbs in the fourth conjugation generally adhere to the following patterns:

• The perfect has suffix -vī. Verbs which adhere to this pattern are considered to be "regular". Examples:
  • "to hear, listen (to)"
  • "to guard"
  • "to sleep"
  • "to hinder, impede"
  • "to fortify, to build"
  • "to punish"
  • "to know"
• The perfect has suffix -uī. Examples:
  • "to open, to uncover"
• The perfect has suffix -sī (-xī when c comes at the end of the root). Examples:
  • "to surround, to enclose"
  • "to confirm, to ratify"
  • "to feel, to perceive"
  • "to bind"
• The perfect has suffix -ī and reduplication. Examples:
  • "to find, discover"
• The perfect has suffix -ī and vowel lengthening in the stem. Examples:
  • "to come, to arrive"
  • "to find"

Deponent verbs in the 4th conjugation include the following:

• "to assent"
• "to experience, test"
• "to bestow"
• "to tell a lie"
• "to measure"
• "to exert oneself, set in motion, build"
• "to obtain, gain possession of"
• "to cast lots"

The verb "to arise" is also regarded as 4th conjugation, although some parts, such as the 3rd singular present tense and imperfect subjunctive , have a short vowel like the 3rd conjugation. But its compound "to rise up, attack" is entirely 4th conjugation.

In the perfect tenses, shortened forms without -v- are common, for example, for . Cicero, however, prefers the full forms to .

Irregular verbs

Sum and possum

The verb "to be" is the most common verb in Latin. It is conjugated as follows:

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I am	I will be	I was		I may be	I might be
	I you sg. he, she, it we you pl. they
Active		I am able	I will be able	I was able		I may be able	I might be able
	I you sg. he, she, it we you pl. they

In early Latin (e.g. Plautus), can be found for the present subjunctive . In poetry the subjunctive also sometimes occurs.

An alternative imperfect subjunctive is sometimes made using etc. See further: Latin tenses#Foret.

Other forms:

• Infinitive: "to be", "to be able"
• Perfect infinitive: "to have been", "to have been able"
• Future infinitive: "to be going to be" (also )
• Imperative: (pl. ) "be!"
• Future imperative: (pl. ) "be! (at a future time)"
• Future participle: (pl. ) "going to be" ( has no future participle or future infinitive.)

The present participle is found only in the compounds "absent" and "present".

In Plautus and Lucretius, an infinitive is sometimes found for "to be able".

The principal parts of these verbs are as follows:

• "to be"
• "to be away"
• "to be present"
• "to be wanting"
• "to be able"
• "to be for, to profit" (adds d before a vowel)

The perfect tenses conjugate in the regular way.

For the difference in meaning between and , see Latin tenses#Difference between eram and fuī

Volō, nōlō, and mālō

The verb and its derivatives and (short for ) resemble a 3rd conjugation verb, but the present subjunctive ending in -im is different:

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I want	I will want	I was wanting		I may want	I might want
	I you sg. he, she, it we you pl. they
Active		I am unwilling	I will be unwilling	I was unwilling		I may be unwilling	I might be unwilling
	I you sg. he, she, it we you pl. they
Active		I prefer	I will prefer	I was preferring		I may prefer	I might prefer
	I you sg. he, she, it we you pl. they

The spellings and were used up until the time of Cicero for and .

These verbs are not used in the passive.

Other forms:

• Infinitive: "to want", "to be unwilling", "to prefer"
• Present participle: "willing", "unwilling"
• Imperative: , pl. (used in expressions such as "don't be surprised!")

Principal parts:

• "to want"
• "not to want, to be unwilling"
• "to prefer"

The perfect tenses are formed regularly.

Eō and compounds

The verb "I go" is an irregular 4th conjugation verb, in which the i of the stem sometimes becomes e. Like 1st and 2nd conjugation verbs, it uses the future -bō, -bis, -bit:

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I go	I will go	I was going		I may go	I might go
	I you sg. he, she, it we you pl. they

Other forms:

• Infinitive: "to go"
• Passive infinitive: "to go" (used impersonally, e.g. "not knowing which way to go")
• Imperative: (pl. ) "go!"
• Future imperative: (pl. ) "go! (at a future time)" (rare)
• Present participle: (pl. ) "going"
• Future participle: (pl. ) "going to go"
• Gerundive: "necessary to go" (used impersonally only)
• Gerund: "of going", "by / for going", "in order to go"

The impersonal passive forms "they go", "they went" are sometimes found.

The principal parts of some verbs which conjugate like are the following:

• "to go"
• "to go away"
• "to go up to"
• "to meet, assemble"
• "to go out"
• "to enter"
• "to perish"
• "to enter"
• "to die, to perish"
• "to pass by"
• "to return, to go back"
• "to go under, to approach stealthily, to undergo"
• "to be sold"

In the perfect tenses of these verbs, the -v- is almost always omitted, especially in the compounds, although the form is common in the Vulgate Bible translation.

In some perfect forms, the vowels ii- are contracted to ī-: second person singular perfect , second person plural perfect ; pluperfect subjunctive ; perfect infinitive (the form is also attested).

The verb "to be able" has forms similar to .

Ferō and compounds

The verb "to bring, to bear, to carry" is 3rd conjugation, but irregular in that the vowel following the root fer- is sometimes omitted. The perfect tense and supine stem are also irregularly formed.

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I bring	I will bring	I was bringing		I may bring	I might bring
	I you sg. he, she, it we you pl. they
Passive		I am brought	I will be brought	I was being brought		I may be brought	I might be brought
	I you sg. he, she, it we you pl. they

The future tense in the 3rd and 4th conjugation (-am, -ēs, -et etc.) differs from that in the 1st and 2nd conjugation (-bō, -bis, -bit etc.).

Other forms:

• Infinitive: "to bring"
• Passive infinitive: "to be brought"
• Imperative: (pl. ) "bring!"
• Passive imperative: (pl. ) "be carried!" (rare)
• Present participle: (pl. ) "bringing"
• Future participle: (pl. ) "going to bring"
• Gerundive: (pl. ) "needing to be brought"
• Gerund: "of bringing", "by /for bringing", "in order to bring"

Compounds of include the following: The principal parts of some verbs which conjugate like are the following:

• "to bring (to)"
• "to carry away, to steal"
• "to collect"
• "to put off"
• "to carry out"
• "to offer"
• "to refer"

The perfect tense , however, belongs to the verb :

• "to raise, to remove"

Fīō

The irregular verb "to become, to happen, to be done, to be made" as well as being a verb in its own right serves as the passive of "to do, to make". The perfect tenses are identical with the perfect passive tenses of .

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I become	I will become	I was becoming		I may become	I might become
	I you sg. he, she, it we you pl. they

The 1st and 2nd plural forms are almost never found.

Other forms:

• Infinitive: "to become, to be done, to happen"
• Imperative: (pl. ) "become!"

Edō

The verb "to eat" has regular 3rd conjugation forms appearing alongside irregular ones:

		Indicative				Subjunctive
		Present	Future	Imperfect		Present	Imperfect
Active		I eat	I will eat	I was eating		I may eat	I might eat
	I you sg. he, she, it we you pl. they

Other forms:

• Infinitive: "to eat"
• Passive infinitive: "to be eaten"
• Imperative: (pl. ) "eat!"
• Present participle: (pl. ) "eating"
• Future participle: (pl. ) "going to eat"
• Gerundive: (pl. ) "needing to be eaten"
• Gerund: "of eating", "by /for eating", "in order to eat" / "for eating"

The passive form "it is eaten" is also found.

The present subjunctive etc. is found mostly in early Latin.

In writing, there is a possibility of confusion between the forms of this verb and those of "I am" and "I give out, put forth"; for example, "to eat" vs. "to be"; "he eats" vs. "he gives out".

The compound verb "to eat up, consume" is similar.

Non-finite forms

The non-finite forms of verbs are participles, infinitives, supines, gerunds and gerundives. The verbs used are:

1st conjugation: – to praise

2nd conjugation: – to frighten, deter

3rd conjugation: – to seek, attack

3rd conjugation (-i stem): – to take, capture

4th conjugation: – to hear, listen (to)

Participles

There are four participles: present active, perfect passive, future active, and future passive (= the gerundive).

• The present active participle is declined as a 3rd declension adjective. The ablative singular is -e, but the plural follows the i-stem declension with genitive -ium and neuter plural -ia.
• The perfect passive participle is declined like a 1st and 2nd declension adjective.
  • In all conjugations, the perfect participle is formed by removing the –um from the supine, and adding a –us (masculine nominative singular).
• The future active participle is declined like a 1st and 2nd declension adjective.
  • In all conjugations the -um is removed from the supine, and an -ūrus (masculine nominative singular) is added.
• The future passive participle, more usually called the gerundive, is formed by taking the present stem, adding "-nd-", and the usual first and second declension endings. Thus forms . The usual meaning is "needing to be praised", expressing a sense of obligation.

	Participles
Present active
Perfect passive
Future active
Gerundive

Infinitives

There are seven main infinitives. They are in the present active, present passive, perfect active, perfect passive, future active, future passive, and potential active. Further infinitives can be made using the gerundive.

• The present active infinitive is the second principal part (in regular verbs). It plays an important role in the syntactic construction of Accusative and infinitive, for instance.
  • means, "to praise."
• The present passive infinitive is formed by adding a –rī to the present stem. This is only so for the first, second and fourth conjugations. In the third conjugation, the thematical vowel, e, is taken from the present stem, and an –ī is added.
  • translates as "to be praised."
• The perfect active infinitive is formed by adding an –isse onto the perfect stem.
  • translates as "to have praised."
• The perfect passive infinitive uses the perfect passive participle along with the auxiliary verb . The perfect passive infinitive must agree with what it is describing in number, gender, and case (nominative or accusative).
  • means, "to have been praised."
• The future active infinitive uses the future active participle with the auxiliary verb .
  • means, "to be going to praise." The future active infinitive must agree with what it is describing in number, gender, and case (nominative or accusative).
  • has two future infinitives: and
• The future passive infinitive uses the supine with the auxiliary verb . Because the first part is a supine, the ending -um does not change for gender or number.
  • is translated as "to be going to be praised." This is normally used in indirect speech. For example: "He hopes that he will be acquitted."
• The potential infinitive uses the future active participle with the auxiliary verb .
  • is used only in indirect statements to represent a potential imperfect or pluperfect subjunctive of direct speech. It is translated with "would" or "would have". For example: (Quintilian) 'it seems unlikely that he would have told a lie, if he had not been desperate'

Infinitives (with masculine endings used for participles)

Present active
Present passive
Perfect active
Perfect passive
Future active
Future passive
Potential

The future passive infinitive was not very commonly used. The Romans themselves often used an alternate expression, followed by a subjunctive clause.

Supine

The supine is the fourth principal part of the verb, as given in Latin dictionaries. It resembles a masculine noun of the fourth declension. Supines only occur in the accusative and ablative cases.

• The accusative form ends in a –um, and is used with a verb of motion in order to show purpose. Thus it is only used with verbs like "to go", "to come", etc. The accusative form of a supine can also take an object if needed.
  • – The father came to praise his children.
• The ablative, which ends in a –ū, is used with the Ablative of Specification.
  • – These arms were the easiest to praise.

	Supine
Accusative
Ablative

Gerund

The gerund is formed similarly to the present active participle. However, the -ns becomes an -ndus, and the preceding ā or ē is shortened. Gerunds are neuter nouns of the second declension, but the nominative case is not present. The gerund is a noun, meaning "the act of doing (the verb)", and forms a suppletive paradigm to the infinitive, which cannot be declined. For example, the genitive form can mean "of praising", the dative form can mean "for praising", the accusative form can mean "praising", and the ablative form can mean "by praising", "in respect to praising", etc.

	Gerund
Accusative
Genitive
Dative
Ablative

One common use of the gerund is with the preposition to indicate purpose. For example, could be translated as "ready to attack". However the gerund was avoided when an object was introduced, and a passive construction with the gerundive was preferred. For example, for "ready to attack the enemy" the construction is preferred over .

Gerundive

The gerundive has a form similar to that of the gerund, but it is a first and second declension adjective, and functions as a future passive participle (see Template:Section link above). It means "(which is) to be ...ed". Often, the gerundive is used with part of the verb , to show obligation.

• "The boy needs to be praised"
• means "The speech is to be praised". In such constructions a substantive in dative may be used to identify the agent of the obligation (), as in meaning "The speech is to be praised by us" or "We must praise the speech".

Gerundive

An older form of the 3rd and 4th conjugation gerundive ends in -undum, e.g. ( for ). This ending is also found with the gerundive of 'I go': 'it is necessary to go'.

For some examples of uses of Latin gerundives, see the Gerundive article.

Periphrastic conjugations

There are two periphrastic conjugations. One is active, and the other is passive.

Active

The first periphrastic conjugation uses the future participle. It is combined with the forms of . It is translated as "I am going to praise", "I was going to praise", etc.

	Conjugation	Translation
Pres. ind.		I am going to praise
Imp. ind.		I was going to praise
Fut. ind.		I shall be going to praise
Perf. ind.		I have been going to praise
Plup. ind.		I had been going to praise
Fut. perf. ind.		I shall have been going to praise
Pres. subj.		I may be going to praise
Imp. subj.		I should be going to praise
Perf. subj.		I may have been going to praise
Plup. subj.		I should have been going to praise

Passive

The second periphrastic conjugation uses the gerundive. It is combined with the forms of and expresses necessity. It is translated as "I am needing to be praised", "I was needing to be praised", etc., or as "I have to (i.e., must) be praised", "I had to be praised", etc. It may also be translated in English word by word, as in "You are to be (i.e., must be) praised."

	Conjugation	Translation
Pres. ind.		I am needing to be praised
Imp. ind.		I was needing to be praised
Fut. ind.		I will be needing to be praised
Perf. ind.		I was needing to be praised
Plup. ind.		I had been needing to be praised
Fut. perf. ind.		I will have been needing to be praised
Pres. subj.		I may be needing to be praised
Imp. subj.		I should be needing to be praised
Perf. subj.		I may have been needing to be praised
Plup. subj.		I should have been needing to be praised
Pres. inf.		To be needing to be praised
Perf. inf.		To have been needing to be praised

Peculiarities

Deponent and semi-deponent verbs

Deponent verbs are verbs that are passive in form (that is, conjugated as though in the passive voice) but active in meaning. These verbs have only three principal parts, since the perfect of ordinary passives is formed periphrastically with the perfect participle, which is formed on the same stem as the supine. Some examples coming from all conjugations are:

1st conjugation: – to admire, wonder

2nd conjugation: – to promise, offer

3rd conjugation: – to speak, say

4th conjugation: – to tell a lie

Deponent verbs use active conjugations for tenses that do not exist in the passive: the gerund, the supine, the present and future participles and the future infinitive. They cannot be used in the passive themselves (except the gerundive), and their analogues with "active" form do not in fact exist: one cannot directly translate "The word is said" with any form of , and there are no forms like loquō, loquis, loquit, etc.

Semi-deponent verbs form their imperfective aspect tenses in the manner of ordinary active verbs; but their perfect tenses are built periphrastically like deponents and ordinary passives; thus, semi-deponent verbs have a perfect active participle instead of a perfect passive participle. An example:

– to dare, venture

Unlike the proper passive of active verbs, which is always intransitive, some deponent verbs are transitive, which means that they can take an object. For example:

– he follows the enemy.

Note: In the Romance languages, which lack deponent or passive verb forms, the Classical Latin deponent verbs either disappeared (being replaced with non-deponent verbs of a similar meaning) or changed to a non-deponent form. For example, in Spanish and Italian, changed to mirar(e) by changing all the verb forms to the previously nonexistent "active form", and changed to osar(e) by taking the participle and making an -ar(e) verb out of it (note that au went to o).

Defective verbs

Defective verbs are verbs that are conjugated in only some instances.

• Some verbs are conjugated only in the perfective aspect's tenses, yet have the imperfective aspect's tenses' meanings. As such, the perfect becomes the present, the pluperfect becomes the imperfect, and the future perfect becomes the future. Therefore, the defective verb ōdī means "I hate." These defective verbs' principal parts are given in vocabulary with the indicative perfect in the first person and the perfect active infinitive. Some examples are:

(future participle ) – to hate

(imperative ) – to remember

– to have begun

• A few verbs, the meanings of which usually have to do with speech, appear only in certain occurrences.

(plur. ), which means "Hand it over" is only in the imperative mood, and only is used in the second person.

The following are conjugated irregularly:

Aio

	Conjugation of
	Indicative present		Indicative imperfect		Subjunctive present		Imperative present
	Singular	Plural	Singular	Plural	Singular	Plural	Singular
First person		—			—	—	—
Second person
Third person							—

Present Active Participle: –

Inquam

	Conjugation of
	Present indicative		Future indicative	Perfect indicative	Imperfect indicative
	Singular	Plural	Singular	Singular	Singular
First person			—		—
Second person
Third person

For

	Conjugation of
	Present indicative		Future indicative	Perfect indicative	Pluperfect indicative	Present imperative
	Singular	Plural	Singular	Singular	Singular	Singular	Plural
First person		—				—	—
Second person	—		—	—	—
Third person						—	—

Present Active Participle –

Present Active Infinitive – (variant: )

Supine – (acc.) , (abl.)

Gerund – (gen.) , (dat. and abl.) , no accusative

Gerundive –

The Romance languages lost many of these verbs, but others (such as ) survived but became regular fully conjugated verbs (in Italian, ).

Impersonal verbs

Impersonal verbs are those lacking a person. In English impersonal verbs are usually used with the neuter pronoun "it" (as in "It seems", or "it is raining"). Latin uses the third person singular. These verbs lack a fourth principal part. A few examples are:

– to rain (it rains)

– to snow (it snows)

– to be proper (it is proper, one should/ought to)

– to be permitted [to] (it is allowed [to])

Irregular future active participles

The future active participle is normally formed by removing the –um from the supine, and adding a –ūrus. However, some deviations occur.

Present active infinitive	Supine	Future active participle	Meaning
			going to help
	(but PPP )		going to wash
			going to produce
			going to fall
			going to cut
			going to enjoy
			going to be born
			going to die
			going to rise

Alternative verb forms

Several verb forms may occur in alternative forms (in some authors these forms are fairly common, if not more common than the canonical ones):

• The ending –ris in the passive voice may be –re as in:

→

• The ending –ērunt in the perfect may be –ēre (primarily in poetry) as in:

→

• The ending –ī in the passive infinitive may be –ier as in:

→ , →

Syncopated verb forms

Like in most Romance languages, syncopated forms and contractions are present in Latin. They may occur in the following instances:

• Perfect stems that end in a –v may be contracted when inflected.

→

→

→

→

• The compounds of (to learn) and (to move, dislodge) can also be contracted.

→

→

→

→

See also

• Grammatical conjugation
• Latin declension
• Romance copula
• William Whitaker's Words

Bibliography

• Gildersleeve, B.L. & Gonzalez Lodge (1895). Gildersleeve's Latin Grammar. 3rd Edition. (Macmillan)

External links

• Verbix automatically conjugates verbs in Latin.
• Latin Verb Synopsis Drill tests a user on his ability to conjugate verbs correctly.
• Arbuckle Latin Conjugator automatically conjugates and translates verbs in Latin.