英语中常用的句型有哪些english

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肯定句改为否定句时，一律在be动词、助动词和情态动词后加“not”，改为一般疑问句时，一律将be动词、助动词和情态动前移到句首（首字母大写）。肯定回答用“Yes”；否定回答用“No”。“Yes”或“No”后面的主语必须用代词，“No”后面必须用否定缩略式。如：

将下列句子改为否定句、一般疑问句，并做肯定、否定回答：

1. There are some computers in this school. (be动词)

There aren’t any computers in this school.

Are there any computers in this school? (Yes, there are. / No, there aren't.)

2. Li Ming’s father can drive the car. (情态动词)

Li Ming’s father can’t drive the car.

Can Li Ming’s father drive the car? (Yes, he can. / No, he can’t.)

3. She has already finished his homework now. (助动词)

She hasn’t finished his homework yet.

Has she finished his homework yet? (Yes, she has. / No, she hasn’t.)