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英语怎么改否定句
英语改否定句如下:
1、句中有be动词(am/is/are/was/were)的,在be动词后加not。
如:I can swim.——I can't swim.
He is a math teacher. → He is not a math teacher.
2、句中有情态动词的(can/should/must/would),在情态动词后面加not。
如:There will be a new building next year. → There will not be a new building next year. (will not可以缩写为won’t)
3、句中没有be动词和情态动词的,在动词前加don’t或doesn’t。
① 句中动词为原形的,加don’t 。
如: I like apples. I don’t like apples.
②句中动词为三单式的,加doesn’t,并将三单式的动词还原成原形。
如:He likes apples. He doesn’t like apples.
4、肯定句中的some在否定句中应改为any。
如:There are some students in the classroom. There are not any students in the classroom.