should/could/must/might have done用法?
请详细讲解一下这几种用法和区别,最后举一些例子.
最后把它们的否定式意义再讲解一下~
人气：211 ℃ 时间：2019-10-11 02:30:09
解答
should have done表示本应做而没做could have done表示本可以做而没做must have done表示对过去事实的肯定判断,语气较重,即很肯定might have done=may have done对过去事实的肯定猜测,语气较轻eg.1.You should have ...
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