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英语
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must have done,must do,can't have done,can't do的区别
人气:360 ℃ 时间:2019-10-10 06:30:51
解答
must have done对过去发生的动作很有把握的肯定推测
must do“必须做”,含有一种命令的口吻,语气强
can't have done对过去发生的动作很有把握的否定推测,意为“不可能做了”
can't do“不能做”表示不给予许可,语气没有must do强
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