12个单元音音标有哪些?

元音音标即元音音素,英语*有20个元音音素.
20个元音音素对应元音音素例子：
1) [i:] sea,he,see,piece,ceiling
2) [i]sit,build,miss,myth
3) [e] bed,desk,head,
4) [ æ ] bad,land,bank,stamp (a和e中间是连起来的)
5) [a:] car,fast,class,plant,calm,aunt
6) [ ɔ] hot,want
7) [ ɔ:] door,more,sport,ball,warm,author,court,bought,caught
8) [u:] good,who,blue,soup,
9) [u] look,put,women,could
10) [ ʌ] cup,come,blood,rough
11) [ ə:] girl,work,serve,nurse
12) [ə ] cadre,ago,forget,polite,dollar,doctor,famous,Saturday
13) [ei] cake,they,play,eight,great,
14) [ai] bike,die,neither,light,try,find,height,eye
15) [əu ] phone,cold,boat,soul,grow
16) [au] house,town
17) [ɔi ] boy,oil
18) [iə ] dear,idea,deer,here,fierce,
19) [ɛə ] pear,care,there,fair
20) [ uə] tour,poor,
a 与an区别,有一条就是an要跟在元音音素前,而a要跟在辅音音素前.