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英语否定句的用法
don't,can't,isn't这三个词在写作文时的用法是:
don't用在一般现在时第1人称，第2人称的否定，can't用在任何人称的否定，表示“不能”，
isn't用在表示“是”和现在进行时的第三人称的否定
什么是英语否定句
英语语法中否定句分为九种：
（1）一般否定句
I don't know this.否定句式
No news is good news. 否定词no
There is no person smoking here.
（2)特指否定
He went to his office, not to see him.
I am sorry for not coming on time.
I don't think/believe/suppose/feel/imagine you are right.
（3)部分否定
All the answers are not right
All is not gold that glitters.
I don't know all of them.
I can't see everybody/everything.
Both of them are not right.
（4)全体否定
None of my friends smoke.
I can see nothing/nobody.
Neither of them is right.
Nothing can be so simple as this.
（5) 延续否定
You didn't see him, neither/nor did I.
You don't know, I don't know either.
He doesn't know English, let alone/to say nothing of/not to speak of (更不用说） French.
（6) 半否定句
We seldom/hardly/scarcely/barely hear such fine singing.
I know little English. I saw few people.
（7) 双重否定
You can't make something out of nothing.
What's done cannot be undone.
There is no sweet without sweat.
No gain without pains.
I can't help /keep/ laughing whenever I hear it.
No man is so old but (that) he can learn.
（8)排除否定
Everyone is ready except you.
He did nothing but play.
But for your help, I couldn't do it.
（9)加强否定
I won't do it at all.
I can't see it any more.
He is no longer a boy.
参考资料：***/view/312417.htm
否定句倒装句英语结构
一、主语＋be动词
含有 am is are 的句子，变否定句时，只需在am is are 后加not.
【例】 This is a book. 否定句 This is not a book .
二、主语＋实义动词
含有实义动词的句子，变否定句分两种。
1、如果主语是第三人称单数时，要在实义动词前加doesn't，后面的动词用原形。
【例】1、He eats an apple. 否定句 He doesn't eat an apple.
2、 如果主语不是第三人称单数时，只需在实义动词前加don't.
【例】 I teach English. 否定句 I don't teach English.
三、主语＋情态动词
含有情态动词的句子,变否定句时, 只需在情态动词后加not。
【例】、 I can dance. 否定句 I can not dance. 或 I can't dance.
四、见到some 变否定句时,要换成any.
【例】、I eat some apples. 否定句 I don't eat any apples.
五、见到and 变否定句时,要换成or.
【例】、There is some air and water on the moon.
否定句 There isn't any air or water on the moon.
六、见到already变否定句时，要换成yet。
【例】、He has had supper already.
否定句 He hasn’t had supper yet.
英语否定句例子100个
以下是10个英语否定句，附译文：
1、I dont know this. No news is good news.
我不知道这个。没有消息就是好消息。
2、There is no person /not a person/not any person in the house.
房子里没有人。
3、None of my friends smoke. I can see nothing/nobody.
我的朋友
都不抽烟。我什么也看不见/谁也看不见
4、Nothing can be so simple as this. Neither of them is right.
没有什么比这更简单了。他们两个都不对。
5、You can't make something out of nothing.
你不能无中生有。
6、Not both of his sisters agree to his suggestion.
他两个姊姊并未都同意他的提议。
7、She goes to school not by bus, but by bike.
她去上学不是乘公共汽车，而是骑车去的。
8、I don’t have any foreign friends. 我没有任何外国朋友。
9、You needn't do your homework today.
今天你不必做作业。
10、They have not seen that movie on television.
他们还没看过电视上的那部影片。
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