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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 h

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/17 22:28:17
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?
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.)