题目

虚拟语气could/should/would/might +have done 用法的差别?
1.It's a great pity that you _____ have done such a thing.
A.ought to B.should C.could D.might
2.As I have nothing to do now,I _____ as well go with you.
A.should B.would C.could D.might
3._______ he could late ,give him the message.
A.Should B.Would C.Had D .Did

提问时间：2020-06-13

答案

could have done本来能够做什么,事实上没做
should have done本来应该做
would have done将来可能做
might have done可能做了
1. 很可惜你没做那件事,事实上你能够做的,所以选C
2. might as well 做什么更好,既然我无事可做,还不如跟着你好了
3. B, 对将来时的虚拟,他可能会迟到,告诉他这个消息