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否定(否定)

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/03/29 06:11:24
在句子中否定有什么规律?有些用Don't........有的用isn't ...............有的用not .....?won't是什么意思?what....where.how..when........为什么它们后面一定要加be?
解题思路: 否定
解题过程:
don't / isn't 这些都是助动词。它的使用与主语的人称和时态,语态都有关系。
当主语是we / they / I 时,并且谓语动词是实义动词,而且用的是一般现在时,那么句子的否定句中就要用don't + 动词。如果主语是he / she / it 时,用doesn't 构成否定句. 如果谓语是一般过去时,那么不受人称的限制,用didn't 构成否定句。如;
I don't study in this school.
He / she / doesn't like apple.
we / they / I / He / she didn't go out yesterday.
isn't 是be 动词的一种, 它前面的主语通常是 he / she / it .
如: He isn't a teacher.
won't 是构成将来时的助动词, 他不受主语的限制。
i won't go out .
特殊疑问词后面的助动词不一定是be 动词。
如:Where are you ?
Where did you go ?
如有问题, 请继续讨论。
最终答案:略