A20011973
幼苗
共回答了22个问题采纳率:86.4% 举报
must的三个含义对应的反意疑问句各不相同:
1)义务,责任,要求(难道不应该吗?)
...must...,mustn't ...
We must follow the traffic rules,mustn't we?
2)必要(有没有这个必要?)
...must...,needn't ...
例如:We must stay here after school,needn't we?
3) (表猜测)一定 (事实不是这样的吗?)
...must be ...,isn't/aren't ...
例如:The man must be Jim's father,isn't he?
实际上,1)和2)区别不大,考试时不会在此纠缠的,多数情况下都只使用mustn't,除非出卷老师是孔乙己的徒弟.
1年前
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