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    精英家教网 > 高中英语 > 题目详情
    His failure suggested that he   the teacher’s suggestions．
    A．can’t have followedB．needn’t follow
    C．mustn’t have followedD．shouldn’t follow
    A

    试题分析：句意：他的失败表明了他不可能听了老师的建议。can’t have done不可能做了某事；must表推测不能用于否定句；因为现在已经失败，所以这是对过去的推测，过去没有听从老师的建议。故选A。
    点评：本题难度适中。情态动词的完成式是高中阶段的重难点之一，需要考生熟记它们的用法，在各类考试中经常出现，它主要用于表示对过去情况进行推测或责备等。
    即学即练：—Can I have something to eat, Mum? I feel hungry.
    You ________ be hungry. You’ve just had some bread and hamburger.
    A. mayn’t    B. won’t    C. mustn’t   D. can’t
    解析：D。否定意义的推测用can或者could来代替must,表示强烈语气。
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