肯定句变否定句
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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