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He can't have been watching television last night. He went to a party with me.
网校学员unr**在学习英语零基础直达大学六级【寒假特惠班】时提出了此问题，已有1人帮助了TA。
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清醒季smile
同学你好，该知识点来自沪江网校《英语零基础直达大学六级【寒假特惠班】》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。
同学你好~can't have been doing和can't have done都是虚拟语气，不是现在完成进行时和现在完成时。
这里表示的都是推测，而不单纯是已经做了某事。
祝同学学习进步~
版权申明：知识和讨论来自课程：《英语零基础直达大学六级【寒假特惠班】》的学员和老师，如果想了解更多，可以报名参加课程学习。所有知识讨论内容，版权归作者及沪江网校所有。
英语零基础直达大学六级【寒假特惠班】
已有35人在本课程中发现了666个知识
已有545个知识得到了老师的回复
本课程热门知识点
- How much does this house worth
- 经常在讲着这道题，但是幻灯片却是另一道题，是我用了两倍速的原因吗？
- It suddenly occurred to one of the workers to open up the box.
- Sam was sure that the wallet must have been found by one of the villagers.
- It had been wrapped up in newspaper and it contained half the money he had lost, together with a note which said: 'A thief
- If you woke up breathing, congratulations! You have another chance.
- Sam Benton, the local butcher, had lost his wallet while taking his savings to the post office.
- How did Sam get his money back?
- How did Sam get his money back?
- Taking hundreds of staff to have a trip will be no picnic.