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    精英家教网 > 高中英语 > 题目详情

    —When I first got to Harvard, my awkward English brought me great trouble.
    ——Oh, dear, it _______a struggle for you to keep up with other students.

    A．might beB．can beC．could have beenD．must have been

    D

    解析试题分析：考查情态动词+have done的用法：句意：--当我第一次到哈佛，我蹩脚的英语给我带来很多麻烦。--哦，那你要跟上其他同学一定很难。可知是对过去的推测，用情态动词+have done，could have been过去可能做却没做， must have been过去一定做了。选D。
    考点：考查情态动词+have done的用法
    点评：情态动词+have done可以表示推测和虚拟：“must+have+done”表示对过去事情的肯定推测，译成“一定做过某事”，该结构只用于肯定句。“can't+have+done”表示对过去事情的否定推测，译成“不可能做过某事”。“may+have+done”表示对发生过的事情的推测，意思是“可能已经”或“也许已经”，用于肯定句中。“could+have+done”是虚拟语气，表示对过去事情的假设，意思是本来能够做某事而没有做。 “would+have+done”虚拟语气，表示对过去事情的假设，意思是“本来会做”。

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