cf:You don't have to knock—just walk in.不必敲门 —— 进来就是了
used to
We didn't use to like him much when we were at school.以前我们同学时,我并不太喜欢他.
情态动词have to的否定形式
情态动词have to的否定形式
have to的否定形式是don't have to吧,而其他情态动词几乎都是后面直接加not,还有没有像have to这种的?
have to的否定形式是don't have to吧,而其他情态动词几乎都是后面直接加not,还有没有像have to这种的?
英语人气：770 ℃时间：2020-01-27 03:48:37
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