may和might可以表示可能性和许可。might的语气比may较婉转。此外,may也可以接动词的完成形式,表示可能、说不定已经做某事。
【例如】
I thought it might be difficult for me to learn advanced mathematics.
May I come in, sir?
She may have gone to the hospital.
[真题]Research findings show we spend about two hours dreaming every night, no matter what we ____during the day.
A) must have done
B) should have done
C) would have done
D) may have done
情态动词后面加动词完成式,有不同意义。
must have done表示一定做过某事;
should have done表示本应该做某事,含有批评的意思;
would have done主要用于虚拟语气,表示对过去的虚拟;
may have done表示可能已经作过某事。
根据句意:研究结果表明,我们每晚有两个小时做梦,不管白天可能做了什么,情态动词后表示可能性,故答案应为D。
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