don't后为什么要加动词原形

发表时间：2024-07-30 09:48:14 来源：网友投稿

因为do是助动词，与not构成否定形式

don't + 动词原形,构成一般现在时的否定结构

如：We don't go to school on weekends.

行为动词

1) 当主语为第一，二人称及复数时，助动词为do

肯定句：主语+动词原形(+其它)。如：We often play basketball after school.

否定句：主语+ don't+动词原形(+其它)。如：we don’t play basketball after school.

一般疑问句：Do +主语+动词原形+其它?

如：Do you often play basketball after school l? Yes, we do. / No, we don't.

特殊疑问句：疑问词+以do开头的一般疑问句？

如：What do you often do after school ?

2) 当主语为第三人称单数时 , 助动词为does

肯定句：主语+动词三单式(+其它)。如：He swims well.

否定句：主语+ doesn’t+动词原形(+其它)。如：He doesn’t swim well..

一般：Does +主语+动词原形+其它。

如：Does he swim well ? Yes, he does. / No, he doesn't.

特殊疑问句：疑问词+以does开头的一般疑问句？

如：How does your father go to work?

具体运用方法

1、Why don't you get yourself a car?你为什么不买辆汽车呢？

2、Why don't you come over to England in the summer? 你为何不在夏天来英格兰呢？

3、You look hot ─ why don't you peel off? 你看来很热——为何不脱掉衣服？

4、Why don't you ask him for his advice? 你为什么不征求他的意见？

5、Why don't you come up to Scotland for a few days? 你为何不上苏格兰来住几天

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