a

1、在开音节中发[ei]音nameplanecake

2、在闭音节中重读时发[æ]音bagdadhat

3、在闭音节中非重读时发[ə]音awayasleepsofa

4、后面是ss,sk,sp,st,f时发[a:]音askgraspclass

5、在w或wh后面时发[ɔ]或[ɔ:]wantwaterwatch