I think he is at home.改为否定句.为什么一定要改成I don't think he is at home而不能改成I think he isn't at home?

问题描述:

I think he is at home.改为否定句.为什么一定要改成I don't think he is at home而不能改成I think he isn't at home?

这是一个主从复合句,否定主句,这是一个规律!(加油)

think引导的从句必须用肯定句。

我不认为和我认为不'第二个还是肯定

可以这样改

当主语为第一人称I/we,后面的动词为think/suppose/believe..引导宾语从句时,若从句是否定句,此时必须“否定前移”.如:I think he is rignt.的否定句:I don't think he is right.(我认为他不对.)