1.Who do you wait for?
2.What do you think about?
3.She has dinner in the restaurant.
4.What did you do yesterday evening?
5.He studied English in the libray yesterday evening.
6.When I did my homework,my mother cooked.
改成:
1.what are you waiting for?表示你在等什么.一般现在时绝对不可以.
2.what do you think about it?think 后面要宾语,about后边要介词宾语,显然what 不能做两个宾语,所以加上it.
3.正确(语法上没错,不过这句话的意思上有点狗屁.加个usually什么就好了)
4.正确(也可以用过去进行时)
5.He studied English in the library yesterday evening.library的拼写错误,不能写成libray
6.when i was doing my homework,my mother cooked.这是一种固定的句式.when后面用进行时,主句用一般时,表示在when从句的动作进行的时间范畴之内,主句的动作在进行.