have to可后接完成式表推测吗

I knew he was in. I think he had to have heard the knock.

请问上面的句子对吗? have to可后接完成式表推测吗?

0 条评论
分类：情态动词

最佳答案 2021-05-01 00:17

Have to 不能接完成式表示推测，只有在接be动词的现在时才可以，而且仅表示对现在和将来的推测，不能表示过去。网友问题句指的是过去。曹老师提供的字典例句也都是be动词的现在时不定式形式。柯林斯字典没有把这个问题说完整。不是be 动词的情况下，have to 不用来表示推测。我不知网友的例句是哪里看来的。根据我的语感，这个例句有误，had to have have heard 似乎没见过这种用法。应该改为must have heard. must 在不跟be 动词的情况下可以用来表示对过去的推测。如果表示现在的推测，也习惯上和be 动词连用。还有一点要注意，have to 表示推测的用法一般不能用于第二人称，我想这也是很多语感差些的人意识不到的。

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王汝涛 - 英语教师

擅长：英语翻译,词法问题,英语考试 | 采纳率 65% | 回答于 2021-01-20 05:11

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其它 1 个回答

曹荣禄 2021-01-19 23:05

擅长：动词用法,句法问题

have to可后接完成式表推测吗

最佳答案 2021-05-01 00:17

其它 1 个回答

have to do表示推测意义的用法，《柯林斯》已经收录：

have to do PHRASE

You can use have to in order to say that you feel certain that something is true or will happen.

There has to be some kind of way out.
That has to be the biggest lie ever told.

相似问题

have to可后接完成式表推测吗

最佳答案 2021-05-01 00:17

其它 1 个回答

have to do表示推测意义的用法，《柯林斯》已经收录：

have to do PHRASE

You can use have to in order to say that you feel certain that something is true or will happen.

There has to be some kind of way out. That has to be the biggest lie ever told.

相似问题

There has to be some kind of way out.
That has to be the biggest lie ever told.