肯定句变否定句

合集下载
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

英语语法之肯定句变否定句一、肯定句变否定句口诀

给句子分析它,看它结构是哪个

主加be后加not 其他一切全照抄

主加动词主重要

don't doesn't 来帮忙

don't doesn't 中间夹

doesn't doesn't 最特殊第三人称单数全靠它

二、简单句的句子结构

1.主语+be+其他

2.主语+动词+其他

备注:其中be里包括(am is are)

判断下列各句是主语加be还是主语加动词

1.I am a girl.

2.I like singing.

3.We go to school every day.

4.They are good friends.

5.He works hard.

6.She likes playing with toys.

7.My mother watches TV every day.

8.You are a beautiful girl.

9.Tom is playing football on the playground.

10.Bill does his homework after supper.

三、肯定句变否定句规则

肯定句

主语+be+其他变成主语+be+not+其他

主语+动词+其他变成主语+don't+动词+其他

主语(第三人称单数)+动词单三+其他变成

主语(第三人称单数)+doesn't +动词原形+其他

练习

1.She is watching TV now.

2.We go to school on Sunday.

3.His father works hard.

4.Jack's mother is a nurse.

5.The cat runs fast.

6.They like reading books.

7.My grandpa gives me a hot dog.

8.Tom often walks to school.

9.I have a doll.

10.It is eating fish.

肯定句变否定句的基本方法

发布人:圣才学习网发布日期:2010-06-24 13:39 共人浏览[大] [中] [小] 【导读】一.动词be的否定式动词be根据不同的人称和时态可以有am, is, are, was, were 等不同形式,可用作连系动词(表示是、在等)和助动词(用于构成进行时态和被动语态等),但不管何种情况,构成否定式时,一律在其后加not: I’m old, but you’re young.

一.动词be的否定式

动词be根据不同的人称和时态可以有am, is, are, was, were等不同形式,可用作连系动词(表示“是”、“在”等)和助动词(用于构成进行时态和被动语态等),但不管何种情况,构成否定式时,一律在其后加not:

I‘m old, but you’re young.我老了,但你还年轻。

→I‘m not old, but you’re not young.我还不老,但你不年轻了。

He was reading and I was writing.他在读,我在写。

→He was not reading and I was not writing.他没有在读,我没有在写。

二.动词have的否定式

动词have根据不同的人称和时态可以有have, has, had等形式,可以用作实意动词和助动词,分以下情况讨论:

1.用作实意动词表示状态,如表示拥有、患病或用于have to表示“必须”等,在构成否定式时可以直接在其后加not,也可根据情况在其前使用don‘t, doesn’t, didn‘t:

He has a car.他有辆小汽车。

→He hasn‘t a car. / He doesn’t have a car.他没有小汽车。

He had some dictionaries.他有一些词典。

→He hadn‘t any dictionaries. / He didn’t have any dictionaries.他没有词典。

You have to go with him.你必须同他一起去。

→You haven‘t to go with him. / You don’t have to go with him.你不必同他一起去。

?注?have to构成否定式时以在其前加don‘t等较为常见。

2.用作实意动词表示动作,如表示“吃(=eat)”、“喝(=drink)”、“拿(=take)”、“收到(=receive)”、“度过(=spend)”等,构成否定式时不能直接在其后加not,而应根据情况在其前使用don‘t, doesn’t, didn‘t:

He had some cake for breakfast.他早餐吃了些蛋糕。

→He didn‘t have any cake for breakfast.他早餐没有吃蛋糕。(不能用had not)

We had a good holiday.我们的假期过得很愉快。

→We didn‘t have a good holiday.我们的假期过得不愉快。(不能用had not)

3.用作助动词构成完成时态,其否定式只能在其后加not:

I have read the book.我读这本书。

→I have not read the book.我还没读这本书。

He had left when I arrived.我到达时他已离开了。

→He hadn‘t left when I arrived.我到达时他还没有离开。

1. 动词be的否定式

动词be根据不同的人称和时态可以有am, is, are, was, were等不同形式,可用作连系动词(表示“是”、“在”等)和助动词(用于构成进行时态和被动语态等),但不管何种情况,构成否定式时,一律在其后加not:

I’m old, but you’re young. 我老了,但你还年轻。

→I’m not old, but you’re not young. 我还不老,但你不年轻了。

He was reading and I was writing. 他在读,我在写。

→He was not reading and I was not writing. 他没有在读,我没有在写。

2. 动词have的否定式

相关文档
最新文档