Phonological history of English consonants

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Template:Short description Template:Lead too short Template:English phonology topicsTemplate:IPA notice This article describes those aspects of the phonological history of English which concern consonants.

Consonant clusters

Script error: No such module "Labelled list hatnote".

H-cluster reductions

  • Reduction of /hw/ – to Script error: No such module "IPA". in a few words (such as who), but usually to Script error: No such module "IPA"., for the great majority of English speakers (so that whine comes to be pronounced the same as wine).
  • Reduction of /hl/, /hr/ and /hn/, with the loss of the initial Script error: No such module "IPA". in Middle English.
  • Reduction of /hj/ to Script error: No such module "IPA". in a few American and Irish dialects (so that hew is pronounced like yew).

Y-cluster reductions

  • Yod-dropping – the elision of Script error: No such module "IPA". in certain clusters, depending on dialect (for example, RP has Script error: No such module "IPA". in new, while General American and Cockney do not).
  • Yod-coalescence, whereby the clusters Script error: No such module "IPA"., Script error: No such module "IPA"., Script error: No such module "IPA". and Script error: No such module "IPA". become Script error: No such module "IPA"., Script error: No such module "IPA"., Script error: No such module "IPA". and Script error: No such module "IPA". respectively (for example, education is often pronounced as if it began "edge").

Other initial cluster reductions

  • Reduction of /wr/ to Script error: No such module "IPA"., in words like wrap, around the 17th century (there was also a reduction of Script error: No such module "IPA". to Script error: No such module "IPA". in Middle English).
  • Reduction of /kn/ and /ɡn/ to Script error: No such module "IPA"., in words like knot and gnome, around the 17th century.
  • S-cluster reduction, in some types of Caribbean English, where for example spit is pronounced pit.

Final cluster reductions

  • NG-coalescence – reduction of the final cluster Script error: No such module "IPA". to Script error: No such module "IPA"., in words like hang, which has occurred in all but a few English dialects.
  • G-dropping – reduction of the final cluster Script error: No such module "IPA". to Script error: No such module "IPA". in weak syllables, principally in the verb ending -ing, which has occurred in many English dialects, although not in the modern standard varieties.
  • Reduction of /mb/ and /mn/ to Script error: No such module "IPA"., in later Middle English, affecting words like lamb and column.
  • Generalized final cluster reduction in African American Vernacular English (AAVE) and Caribbean English, where for example desk and hand may be pronounced "dess" and "han".

Other changes involving clusters

Stops

Aspiration

The voiceless stops Script error: No such module "IPA"., Script error: No such module "IPA"., Script error: No such module "IPA". are typically aspirated when they begin a stressed syllable, becoming Script error: No such module "IPA"., as described under English phonology (obstruents). There is some regional variation in the degree of aspiration, and in some Scottish and northern English accents aspiration does not occur at all.[1]

In certain accents, such as Geordie (among younger women)[2] and in some speakers of Dublin English,[3] Script error: No such module "IPA"., Script error: No such module "IPA". and Script error: No such module "IPA". can be preaspirated when they come at the end of a word or utterance, becoming Script error: No such module "IPA"..

Flapping

Script error: No such module "Labelled list hatnote". Flapping, or tapping, is a process whereby Script error: No such module "IPA". or Script error: No such module "IPA". is pronounced as the alveolar flap Script error: No such module "IPA". in certain positions, especially between vowels (but also sometimes after other sonorants). It may be perceived as, for example, the pronunciation of butter as "budder". It occurs especially in North American English (to varying extents) and in Australian and New Zealand English.

Voicing

Apart from the T-voicing that results from flapping (described above), some dialects feature other instances of voicing or lenition of the stops Script error: No such module "IPA"., Script error: No such module "IPA". and Script error: No such module "IPA".. In Geordie, these stops may be fully voiced (Script error: No such module "IPA"., Script error: No such module "IPA"., Script error: No such module "IPA".) in intervocalic position.[2] In Devon, stops and other obstruents may be voiced (or at least lenited) between vowels and when final after a weak vowel, so for example the Script error: No such module "IPA". and Script error: No such module "IPA". in jacket may approach the realizations Script error: No such module "IPA". and Script error: No such module "IPA"., making the word sound similar or identical to jagged.[4]

Glottalization

Stops, chiefly the voiceless stops, and especially Script error: No such module "IPA"., are frequently glottalized or pre-glottalized in certain positions; that is, a stop may be replaced with the glottal stop Script error: No such module "IPA"., or else a glottal stop may be inserted before it. These phenomena are strongly dependent on the phonetic environment and on dialect. For details, see T-glottalization, as well as English phonology (obstruents) and glottalization in consonant clusters.

If all final voiceless stops are glottalized, as may occur in some London speech, then sets of words such as lick, lit and lip may become homophones, pronounced Script error: No such module "IPA"..[5]

Fricatives and affricates

H-dropping and H-insertion

Script error: No such module "Labelled list hatnote". H-droppingScript error: No such module "anchor".Script error: No such module "anchor". is the omission of initial Script error: No such module "IPA". in words like house, heat and hangover. It is common in many dialects, especially in England, Wales, Australia and Jamaica, but is generally stigmatized, and is not a feature of the standard accents. The Script error: No such module "IPA". is nonetheless frequently dropped in all forms of English in the weak forms of function words like he, him, her, his, had and have. The opposite of H-dropping, called H-insertion or H-adding, may arise as a hypercorrection by typically H-dropping speakers, or as a spelling pronunciation.

Loss of velar and palatal fricatives

The voiceless velar and palatal fricative sounds Script error: No such module "IPA". and Script error: No such module "IPA"., considered to be allophones of Script error: No such module "IPA". and reflected by the Template:Angbr in the spelling of words such as night, taught and weight, were lost in later Middle English or in Early Modern English. Their loss was accompanied by certain changes in the previous vowels. In some cases Script error: No such module "IPA". became Script error: No such module "IPA"., as in laugh.

A Script error: No such module "IPA". is still heard in words of the above type in certain Scots and northern English traditional dialect speech. A Script error: No such module "IPA". is more commonly heard, especially in the Celtic countries but also for many speakers elsewhere, in the word loch and in certain proper names such as Buchan.

Alexander John Ellis reported use of [x] in England on the Yorkshire-Lancashire border and close to the Scottish border in the late nineteenth century.[6]

For details of the above phenomena, see H-loss (Middle English). See also the vocalization of the voiced velar fricative Script error: No such module "IPA"..

Voiced/voiceless splits

The Old English fricatives Script error: No such module "IPA". had voiceless and voiced allophones, the voiced forms occurring in certain environments, such as between vowels, and in words originating from the Kentish dialect (like vane, vinew, vixen, and zink), word-initially. In Early Middle English, partly by borrowings from French, they split into separate phonemes: Script error: No such module "IPA".. See Middle English phonology – Voiced fricatives.

Also in the Middle English period, the voiced affricate Script error: No such module "IPA". took on phonemic status. (In Old English, it is considered to have been an allophone of Script error: No such module "IPA".). It occurred in Middle English not only in words like brigge ("bridge") in which it had been present in Old English but also in French loanwords like juge ("judge") and general.

After the Middle English period, a fourth voiced fricative, Script error: No such module "IPA"., developed as a phoneme (alongside the voiceless Script error: No such module "IPA".). It arose from yod-coalescence (Script error: No such module "IPA".) in words like measure, and from late French loanwords like rouge and beige.[7]

Dental fricatives

Script error: No such module "Labelled list hatnote". As noted above, the Old English phoneme Script error: No such module "IPA". split into two phonemes in early Middle English: a voiceless dental fricative Script error: No such module "IPA". and a voiced dental fricative Script error: No such module "IPA".. Both continued to be spelt Template:Angbr.

Certain English accents feature variant pronunciations of these sounds. These include fronting, where they merge with Script error: No such module "IPA". and Script error: No such module "IPA". (found in Cockney and some other dialects); stopping, where they approach Script error: No such module "IPA". and Script error: No such module "IPA". (as in some Irish speech); alveolarisation, where they become Script error: No such module "IPA". and Script error: No such module "IPA". (in some African varieties); and debuccalisation, where Script error: No such module "IPA". becomes Script error: No such module "IPA". before a vowel (found in some Scottish English).

Initial fricative voicing

File:Initial fricative voicing.svg
The initial consonant in the word finger in traditional dialects of England.

Initial fricative voicing is a process that occurs in some traditional accents of the English West Country, where the fricatives Script error: No such module "IPA"., Script error: No such module "IPA"., Script error: No such module "IPA". and Script error: No such module "IPA". are voiced to Script error: No such module "IPA"., Script error: No such module "IPA"., Script error: No such module "IPA". and Script error: No such module "IPA". when they occur at the beginning of a word. (Words beginning Script error: No such module "IPA"., like three, develop Script error: No such module "IPA". instead.) In these accents, sing and farm are pronounced Script error: No such module "IPA". and Script error: No such module "IPA".. The phenomenon is well known as a stereotypical feature, but is now rare in actual speech.[8] Some such pronunciations have spread from these dialects to become standard usage: the words vane, vat and vixen all had initial Script error: No such module "IPA". in Old English (Script error: No such module "Lang".).[9]

A similar phenomenon occurred in both German and Dutch.

Homophonous pairs
voiceless voiced IPA
fail vale Script error: No such module "IPA".
fail veil Script error: No such module "IPA".
fairy vary Script error: No such module "IPA".
fan van Script error: No such module "IPA".
fast vast Script error: No such module "IPA".
fat vat Script error: No such module "IPA".
fault vault Script error: No such module "IPA".
fear veer Script error: No such module "IPA".
fecks vex Script error: No such module "IPA".
fee vee Script error: No such module "IPA".
feel veal Script error: No such module "IPA".
feeler velar Script error: No such module "IPA".
fend vend Script error: No such module "IPA".
ferry very Script error: No such module "IPA".
fetch vetch Script error: No such module "IPA".
fetter vetter Script error: No such module "IPA".
fest vest Script error: No such module "IPA".
few view Script error: No such module "IPA".
fie vie Script error: No such module "IPA".
figure vigour Script error: No such module "IPA".
file vial Script error: No such module "IPA". With vile-vial merger.
file vile Script error: No such module "IPA".
fill vill Script error: No such module "IPA".
final vinyl Script error: No such module "IPA".
fine vine Script error: No such module "IPA".
fizz viz. Script error: No such module "IPA".
focal vocal Script error: No such module "IPA".
foist voiced Script error: No such module "IPA".
folly volley Script error: No such module "IPA".
foul vowel Script error: No such module "IPA". With vile-vial merger.
fowl vowel Script error: No such module "IPA". With vile-vial merger.
fox vox Script error: No such module "IPA".
sag zag Script error: No such module "IPA".
said zed Script error: No such module "IPA".
sane Zane Script error: No such module "IPA".
sap zap Script error: No such module "IPA".
sax zax Script error: No such module "IPA".
scene zine Script error: No such module "IPA".
sea zee Script error: No such module "IPA".
seal zeal Script error: No such module "IPA".
see zee Script error: No such module "IPA".
seen zine Script error: No such module "IPA".
seine Zane Script error: No such module "IPA".
seize zees Script error: No such module "IPA".
sewn zone Script error: No such module "IPA".
sing zing Script error: No such module "IPA".
sink zinc Script error: No such module "IPA".
Sioux zoo Script error: No such module "IPA".
sip zip Script error: No such module "IPA".
sit zit Script error: No such module "IPA".
sone zone Script error: No such module "IPA".
sown zone Script error: No such module "IPA".
thigh thy Script error: No such module "IPA".
thou (thousand(th)) thou (you) Script error: No such module "IPA".
thrall drawl Script error: No such module "IPA".
thread dread Script error: No such module "IPA".
threw drew Script error: No such module "IPA".
throne drone Script error: No such module "IPA".
through drew Script error: No such module "IPA".
thrown drone Script error: No such module "IPA".
thrift drift Script error: No such module "IPA".
thrive drive Script error: No such module "IPA".
thriven driven Script error: No such module "IPA".
throve drove Script error: No such module "IPA".

Other changes

  • In Glasgow and some other urban Scottish accents, Script error: No such module "IPA". is given an apico-alveolar articulation, which auditorily gives an impression of a retracted pronunciation similar to Script error: No such module "IPA"..[10] Confusion between Script error: No such module "IPA". and Script error: No such module "IPA". (or Script error: No such module "IPA".) occurs in some African varieties of English, so ship may be pronounced like sip (or chip).[11] In Zulu English, it is reported that Script error: No such module "IPA". is sometimes replaced by Script error: No such module "IPA"..[12]
  • The labiodental fricative Script error: No such module "IPA". is sometimes merged with the corresponding bilabial stop Script error: No such module "IPA".. Some speakers of Caribbean English[13] and Mexican American English merge Script error: No such module "IPA". with Script error: No such module "IPA"., making ban and van homophones (pronounced as Script error: No such module "IPA"., or as Script error: No such module "IPA". with a bilabial fricative). The distinction of Script error: No such module "IPA". from Script error: No such module "IPA". is one of the last phonological distinctions commonly learnt by English-speaking children generally, and pairs like dribble/drivel may be pronounced similarly even by adults.
  • In Indian English, Script error: No such module "IPA". is often pronounced like Script error: No such module "IPA"., sounded as Script error: No such module "IPA". or as a labiodental approximant Script error: No such module "IPA"..[14] Some Indian speakers make various changes in the pronunciation of other fricatives: Script error: No such module "IPA". may become Script error: No such module "IPA". or Script error: No such module "IPA".; Script error: No such module "IPA". may become Script error: No such module "IPA". or Script error: No such module "IPA".; Script error: No such module "IPA". may become Script error: No such module "IPA"., Script error: No such module "IPA". or Script error: No such module "IPA"., Script error: No such module "IPA". may become Script error: No such module "IPA". or Script error: No such module "IPA".; Script error: No such module "IPA". may become Script error: No such module "IPA".; Script error: No such module "IPA". may become a bilabial Script error: No such module "IPA". or an aspirated stop Script error: No such module "IPA"..[15] For Script error: No such module "IPA". and Script error: No such module "IPA"., see th-stopping.
  • For some speakers of Mexican American English, initial Script error: No such module "IPA". and Script error: No such module "IPA". may be used in place of each other, so jet may be pronounced as yet or vice versa.[16]
  • In Indian South African English, the typical realization of the labiodental fricatives Script error: No such module "IPA". are the approximants Script error: No such module "IPA"..[17]

Approximants

Insertion and deletion of /j/ and /w/

In parts of the west and southwest of England, initial Script error: No such module "IPA". may be dropped in words like wool and woman; occasionally, though, a Script error: No such module "IPA". may be inserted before certain vowels, as in "wold" for old and "bwoiling" for boiling. Similarly, initial Script error: No such module "IPA". may be lost in words like yeast and yes (this has also been reported in parts of eastern England), and may be added in words like earth (making "yearth").[18]

For the much more widespread deletion of Script error: No such module "IPA". in consonant clusters, see yod-dropping (and compare also yod-coalescence and yod-rhotacization). For the historical loss of Script error: No such module "IPA". in such words as who and write, see pronunciation of wh and reduction of /wr/.

Realizations of /r/

Script error: No such module "Labelled list hatnote". Old and Middle English Script error: No such module "IPA". was historically pronounced as an alveolar trill, Script error: No such module "IPA".. At some time between later Middle English and Early Modern English, it changed to an alveolar approximant, Script error: No such module "IPA"., in the standard accents. Some Scottish speakers, however, retain the original trilled ("rolled") Script error: No such module "IPA"..[19]

Another possible realization of Script error: No such module "IPA". is the alveolar tap, Script error: No such module "IPA".. This is common (alongside Script error: No such module "IPA".) in Scotland, and is also found in certain other accents, chiefly in positions between vowels or between a consonant and a vowel – this occurs, for example, in some Liverpool English and in some upper-class RP[20] (this should not be confused with the tap pronunciation of /t/ and /d/, found especially in North America).

In most General American, Script error: No such module "IPA". is Script error: No such module "IPA". before a vowel, but when not followed by a vowel is generally realized as an r-colored vowel, Script error: No such module "IPA"., or as r-coloring on the preceding vowel. In many accents of English, including RP, Script error: No such module "IPA". is lost altogether when not followed by a vowel – for this, see rhoticity in English (and for related phenomena, linking and intrusive R). For vowel changes before Script error: No such module "IPA"., see English-language vowel changes before historic /r/.

A uvular realization of Script error: No such module "IPA"., the "Northumbrian burr", is used by some speakers in the far north of England.

A relatively recent innovation in the southeast of England, possibly originating from Cockney, is the use of a labiodental approximant, Script error: No such module "IPA"., for Script error: No such module "IPA"..[19] To some listeners this can sound like a Script error: No such module "IPA"..

Developments involving /l/

Script error: No such module "Labelled list hatnote". Velarization of Script error: No such module "IPA". in positions where there is no vowel following, producing a "dark L", is a phenomenon that goes back to Old English times.[21] Today there is much variation between dialects as regards the degree and distribution of this velarization; see English phonology (sonorants).

In Early Modern English, in many words in which a dark Script error: No such module "IPA". followed the vowel Script error: No such module "IPA". or Script error: No such module "IPA"., the Script error: No such module "IPA". either disappeared or underwent vocalization, usually with some kind of diphthongization or compensatory lengthening of the preceding vowel. This affected:

  • Words with final Script error: No such module "IPA". and Script error: No such module "IPA"., which underwent partial L-vocalization, with the insertion of Script error: No such module "IPA". between the vowel and the Script error: No such module "IPA".. The resulting diphthongs developed respectively into modern Script error: No such module "IPA". in words like all, ball, call, and into the Template:Sc2 vowel in words like poll, scroll and control. Some words of more recent origin did not undergo these changes, such as pal, doll and alcohol; the word shall is also unaffected.
  • Words with Script error: No such module "IPA". and Script error: No such module "IPA". followed by a coronal consonant, which followed the same pattern as those above, although here in modern RP the Script error: No such module "IPA". of the first set is mostly replaced by a short Script error: No such module "IPA"., as in words like salt, halt, falter, bald, false, Walsh. Words in the second set, having the Template:Sc2 vowel, include old, cold and bolt (though some RP speakers also have Script error: No such module "IPA". in words like bolt). The word solder has a variety of pronunciations; in North America the Script error: No such module "IPA". is often dropped.
  • Words with Script error: No such module "IPA". and Script error: No such module "IPA"., which again followed the same pattern, but also dropped the Script error: No such module "IPA"., so that words like chalk, talk and walk now have Script error: No such module "IPA"., while folk and yolk rhyme with smoke.
  • Words with Script error: No such module "IPA". or Script error: No such module "IPA". (calf, half, halve), which simply lost the Script error: No such module "IPA". (the vowel of these is now Script error: No such module "IPA". in General American and Script error: No such module "IPA". in RP, by Template:Sc2-broadening). The word salve is often pronounced with the Script error: No such module "IPA".; the name Ralph may be Script error: No such module "IPA"., Script error: No such module "IPA"., Script error: No such module "IPA". or Script error: No such module "IPA".. Words like solve were not affected, although golf dropped the Script error: No such module "IPA". in some British accents.
  • Words with Script error: No such module "IPA". and Script error: No such module "IPA"., which lost the Script error: No such module "IPA". and lengthened the vowel (the lengthened Script error: No such module "IPA". later becoming diphthongized in the toe–tow merger). Words like alms, balm, calm, Chalmers, qualm, palm and psalm now generally have Script error: No such module "IPA". in the standard accents, while holm and Holmes are homophones of home(s). Some accents (including many of American English) have reintroduced the Script error: No such module "IPA". in these words as a spelling pronunciation. The word salmon generally retains a short vowel despite the loss of Script error: No such module "IPA"..
  • A few words with Script error: No such module "IPA". or Script error: No such module "IPA"., such as Alban and Albany, which have developed to Script error: No such module "IPA". (though Albania usually has Script error: No such module "IPA".), and Holborn, which has the Template:Sc2 vowel and no Script error: No such module "IPA".. Words like scalp and Alps are unaffected.

As noted under some of the points above, Script error: No such module "IPA". may be reintroduced in some of the words from which it has been lost, as a spelling pronunciation. This happens sometimes in Irish English, where for example Dundalk may be pronounced Script error: No such module "IPA". (in standard English the Template:Angbr is silent).

The Script error: No such module "IPA". has also been lost in the words would and should. The word could was never pronounced with Script error: No such module "IPA".; its spelling results from analogy with the former words.

Modern L-vocalization (the replacement of "dark" Script error: No such module "IPA". with a non-syllabic vowel sound, usually similar to Script error: No such module "IPA". or Script error: No such module "IPA".) is a feature of certain accents, particularly in London English and in near-RP speech that has been influenced by it ("Estuary English"), in some New York and Philadelphia speech, in the American South and African American Vernacular English, and in New Zealand English.[22] Also in AAVE and some southern American accents, L-dropping may occur when the Script error: No such module "IPA". sound comes after a vowel and before a labial consonant in the same syllable, causing pronunciations like Script error: No such module "IPA". for help and Script error: No such module "IPA". for self.[23]

In some accents around Bristol, "intrusive L" is found, where an Script error: No such module "IPA". is inserted at the end of words ending in schwa, like comma and idea. This is now somewhat stigmatized, but far from rare. The name Bristol itself was formerly Bristow.[24]

In some modern English accents, significant pre-L breaking occurs when Script error: No such module "IPA". follows certain vowels (Script error: No such module "IPA"., Script error: No such module "IPA"., and diphthongs ending Script error: No such module "IPA". or Script error: No such module "IPA".). Here the vowel develops a centering offglide (an additional schwa) before the Script error: No such module "IPA".. This may cause reel to be pronounced like real, and tile, boil and fowl to rhyme with dial, royal and vowel. Wells considers this breaking to be a feature of Midwestern and New York English.[25] Similar pre-L schwa-insertion may also occur after Script error: No such module "IPA". (in rhotic accents), leading to pronunciations like Script error: No such module "IPA". for world.

Sound changes involving final consonants

Final obstruent devoicing

Final obstruent devoicing is the full devoicing of final obstruents that occurs for some AAVE speakers in Detroit where obstruents are devoiced at the end of a word. The preceding length of the vowel is maintained when the final obstruents are devoiced in AAVE: Script error: No such module "IPA". and Script error: No such module "IPA". for "big" and "bad".[23]

Most varieties of English do not have full devoicing of final voiced obstruents, but voiced obstruents are partially devoiced in final position in English, especially when they are phrase-final or when they are followed by a voiceless consonant (for example, bad cat Script error: No such module "IPA".). The most salient distinction between bad and bat is not the voicing of the final consonant but the duration of the vowel and the possible glottalization of final Script error: No such module "IPA".: bad is pronounced Script error: No such module "IPA". while bat is Script error: No such module "IPA"..

Final consonant deletion

Final consonant deletion is the nonstandard deletion of single consonants in syllable-final position occurring for some AAVE speakers[23] resulting in pronunciations like:

  • bad - Script error: No such module "IPA".
  • con - Script error: No such module "IPA".
  • foot - Script error: No such module "IPA".
  • five - Script error: No such module "IPA".
  • good - Script error: No such module "IPA".

When final nasal consonants are deleted, the nasality is maintained on the preceding vowel. When voiced stops are deleted, the length of the preceding vowel is maintained. Consonants remaining from reduced final clusters may be eligible for deletion. The deletion occurs especially if the final consonant is a nasal or a stop. Final-consonant deletion is much less frequent than the more common final-cluster reduction.

Consonants can also be deleted at the end of a morpheme boundary, leading to pronunciations like Script error: No such module "IPA". for kids.

Other changes

Script error: No such module "IPA". merger

Template:See

See also

References

Template:Reflist

Bibliography

Template:Refbegin

  • Script error: No such module "citation/CS1".
  • Wells, John C. (1982), Accents of English (3 vols.), Cambridge University Press.

Template:Refend

Template:History of English

  1. Wells (1982), p. 74.
  2. a b Template:Harvcoltxt
  3. Script error: No such module "citation/CS1".
  4. Wells (1982), pp. 343–344.
  5. Wells (1982), p. 323.
  6. Script error: No such module "citation/CS1".
  7. Prins, A.A., A History of English Phonemes, Leiden University Press 1972, p. 222.
  8. Wells (1982), p. 342.
  9. Template:OEtymD
  10. Cole, J., Hualde, J.I., Laboratory Phonology 9, Walter de Gruyter 2007, p. 69.
  11. Wells (1982), p. 640.
  12. Wade, R., The structural characteristics of Zulu English, 4.2.3.
  13. Wells (1982), p. 568.
  14. Wells (1982), p. 629.
  15. Wells (1982), pp. 628–629.
  16. "Chicano English", Universität Duisburg-Essen. Retrieved 2015-10-02.
  17. Script error: No such module "citation/CS1".
  18. Wakelin, M.F., Discovering English Dialects, Osprey Publishing 1994, p. 27.
  19. a b Pfenninger, S.E. et al., Contact, Variation, and Change in the History of English, John Benjamins 2014, p. 98.
  20. Wells (1982), pp. 282, 372, 411.
  21. Theyskens, L., Taeldeman, J., Recent Advances in Phonological Theory, Communication & Cognition 1979, p. 110.
  22. Wells (1982), pp. 295, 313–317, 517, 551, 557, 609.
  23. a b c Phonological Features of African American Vernacular English
  24. Wells (1982), pp. 344–345.
  25. Wells (1982), pp. 487, 505.