may have done是什么意思你知道may have done的意思吗?

请看下面一题:“Do you think he is lazy?

” “I _____ so once, but I don’t now.

”A.

may have thought B.

can have thoughtC.

may think D.

might think【分析】答案选A。

从答话人的语境可知，空格处的意思“曾经这样想过”，即对过去情况作推测，故应用“情态动词+动词完成式”；又因为 can 表推测不用于肯定句，故选A。

请看类例：Their answers are exactly the same — one of them ______ from the other.

A.

must copy B.

must have copiedC.

should copy D.

should have copied答案选B，既然两人的答案完全一样，说明“抄袭”已经发生，故用“情态动词+动词完成式”，根据句意，应选B而不能选D



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