题目

I do not know you are here ,( He used to go to work by bus (
he did not used to go to work by bus ,(
添反义疑问句,为什么?尽量扩充一下关于这两个知识点里没写到的
还有we had to stay at home,(

提问时间：2020-07-25

答案

I do not know you are here ,(are you
He used to go to work by bus ( didn't he)?
he did not used to go to work by bus ,( did he
we had to stay at home,( didn't we
反义疑问句遵循前肯都否的原则.