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could have done

网校学员Rea**在学习2020年12月CET英语四级【全程班】时提出了此问题,已有1人帮助了TA。

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AnnieGuo0909

同学你好,该知识点来自沪江网校《2020年12月CET英语四级【全程班】》的课程,想要更系统的学习,欢迎进入课程学习。不仅可以和更多的同学一起学习,而且还有老师、助教随时的学习指导和知识点解答哦。

同学好:
might have done
①表示对过去某事的推测,认为某一件事情在过去可能发生了。如果使用might,语气就比较婉转或更加不肯定,如:Mary might have learned some Chinese before.
②可以表示过去本来可以做到而实际没有做到的事情,有“劝告”或“责备”的语气,如:You didn't do the work well that day. You might have done it better.

could have done
表示“本来能够做某事,而实际上未做”。如:
But we could have done it all so much better.
但是,我们本可以把这一切做得更好。

祝学习愉快!

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