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Close vowel sounds may alternate between close vowel sounds and near-close vowel sounds .
Vowel combinations
Oral
Nasal
Stop
Medial
coda
i
y
u
m
n
ŋ
p
t
k
Nucleus
Vowel
a
ai
au
am
an
aŋ
ap
at
ak
wa
wai
wan
wat
ɐi
ɐu
ɐm
ɐn
ɐŋ
ɐp
ɐt
ɐk
wɐi
wɐn
wɐt
i(ɛ)
iɛu
iɛm
iɛŋ
iɛp
iɛk
(ei)
eŋ
ek
wek
i
iu
im
in
ip
it
œ
øy
y
ɔ
ɔi
ɔm
ɔn
ɔŋ
ɔp
ɔt
ɔk
ou
oŋ
ok
u
ui
un
ut
Tone
Bobai dialect is widely cited as having the most tones of any variety of Chinese, though it actually only has six, the same as most Yue dialects. The reason for the claim is that Bobai makes a four-way tonal distinction in checked syllables, whereas most other Yue dialects have three. In Yulin dialect just to the north of Bobai, however, neither entering tone is split: there are just two entering tones, 7 and 8. Lee (1993) believes that Bobai is innovative in having split 8, whereas Yulin (along with several neighboring interior Yue dialects) is innovative in having merged a former split in 7: proto-Yue probably had 7a, 7b, and 8.
Many Yue varieties exhibit a "changed tone" with some semantic content. Such tones occur in the Yulin dialect, in checked syllables only, marking diminutives. In such cases, the final stop -p, -t or -k is changed to a homorganic nasal -m, -n or -ŋ, respectively, and the pitch contour is also altered. This seems to be a trace of a now-lost suffix similar to ér (兒, Middle Chinesenye) in other Chinese varieties.
References
Citations
Olson, An Ethnohistorical Dictionary of China
^ Hashimoto, Anne Yue (1971). A Guide to the Teng-xian Dialect. Princeton University, N.J. Chinese Linguistics Project.
Hashimoto, Anne Yue, 1971. A Guide to the Teng-xian Dialect. Princeton University, N.J. Chinese Linguistics Project.
Ann Yue, 1979. The Teng-xian Dialect of Chinese: Its Phonology, Lexicon and Texts with Grammatical Notes. Computational Analysis of Asian and African Languages Monograph Series, No. 3.