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。 说明:引用此文请注明出处,并请保留该文章链接地址,谢谢~~