情态动词have to的否定形式
题目
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?
答案
cf:You don't have to knock—just walk in.不必敲门 —— 进来就是了
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