-----We did not see him at the lecture yesterday.
题目
-----We did not see him at the lecture yesterday.
------You______him,since I went to an international conference with him,
B.can't have seen C.couldn't see
can't have done/shouldn't have done/mustn't have
答案
can't have done/shouldn't have done都是对过去的虚拟,不能用mustn't have done表示对过去的猜测can't have done是过去不可能做shouldn't have done是本不应该做,但是已经做了选B是因为这是对过去的猜测.第二个人说...
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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