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| Vowels |
| IPA | Pinyin | Bopomofo | English approximation |
| [a] | a (a, an) | ㄚ, ㄢ |
Somewhat like car |
| aɪ | ai | ㄞ |
time |
| [ɑ] | a (ang), e (er) | ㄤ, ㄦ |
car |
| ɑʊ | ao | ㄠ |
how |
| eɪ | ei[2] | ㄟ |
hey |
| [ɛ] | e (ye), a (yan, yuan) | ㄝ,ㄧㄢ , ㄩㄢ |
yes |
| [œ] | e (yue) | ㄩㄝ |
No English equivalent; Rounded [ɛ] |
| [ə] | e (en[2], eng) | ㄣ, ㄥ |
about |
| [ɤ] | e | ㄜ |
Somewhat like hood |
| [i] | yi/-i (yi, yin, ying) | ㄧ |
see |
| ɨ |
i (si, zi, ci, shi, zhi, chi, ri) (buzzing)[3] | ㄭ |
| oʊ | ou[2] | ㄡ |
hoe |
| [ɔ] | o (wo[4]) | ㄛ |
war |
| [u] | wu/-u | ㄨ |
woo |
| [ʊ] | o (ong) | ㄨㄥ |
hood |
| [y] | yu/-ü[1] (yu, yun) | ㄩ |
Somewhat like cute |
| Nasal[5] |
| ɑ̃ |
ang (angr) | |
No English equivalent; nasal [ɑ] |
| ə̃ |
eng (engr) | |
No English equivalent; nasal [ə] |
| ʊ̃ |
ong (ongr) | |
No English equivalent. Nasal [ʊ] |
| IPA |
Pinyin |
Description |
| Tones |
| ǎ ɤ̌ |
á, é |
mid rising: ˧˥ |
| â ɤ̂ |
à, è |
high falling: ˥˩ |
| á ɤ́ |
ā, ē |
high: ˥ |
| à, ɤ̀ |
ǎ, ě |
medially, low: ˩ initially, mid falling: ˧˩ finally, low rising: ˩˧ in isolation, dipping: ˧˩˧ |
| a, ɤ |
a, e |
"toneless": low after a falling tone [â]; mid after all other tones |
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