英语的否定句怎么写？英语否定句写法如下：1、简单句中含有系动词be、情态动词和助动词时，变否定句时需在系动词be、情态动词和助动词后加not。2、简单句中谓语动词为行为动词时，要根据时态选用do的相应形式，把肯定句变为否定句。3、那么，英语的否定句怎么写？一起来了解一下吧。
简单地说就是在动词后面加not，有is、am、are的句子会在这些词后面加not，I am(not)a boy。没有is、am、are的句子会在动词前加don't或者do not，I（don't）like basketball。如果有must、may、can这类的词，在这类词后面加not，I can （not）walk。根据句子的不同情况进行改动。
否定句是表示否定的句子。必须有否定词，古代汉语中否定词可以是副词“不”、“弗”、“毋”、“勿”、“未”、“否”、“非”，可以是动词如“无”。
否定句分类
1一般否定句
I don't know this. No news is good news.
There is no person（smoking）/not a person/not any person（smoking）in the house.
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.
It isn't a dog.那不是一只狗
I don't know it我不知道
He doesn't like her他不喜欢她
以上都是否定句，希望能够帮助到你。
英语改否定句的方法如下：
1、看句中有无be动词，如有,直接在be动词后+ not。
2、看句中有无情态动词，如有,直接在情态动词后+ not。
3、如上述二者都没有,就应用助动词+ not。
(1)肯定陈述句中本来是没有助动词的,要加上去,位置在主语(某人或某物)后,动词前。
(2)确定助动词用do、does还是did,根据句中动词,动词是原形的助动词就用do,动词是第三人称单数的助动词就用does,动词用过去式的助动词就有did。
(3)在助动词后加not。
(4)原句中动词假如发生变化就要恢复成原形。
强调一点,有some的要考虑是否要用any。
怎样翻译英语否定结构
1、部分否定：all, both, every, everybody, everyday, everyone, many,everything,entirely, altogether, absolutely, wholly, completely, everywhere, always, often等与否定词not搭配使用，表示部分否定。常常翻译为“并非所有，并不是都”。
一.肯定句：是指用肯定的语气来陈述的句子。
例：
This is my pen。
这是我的笔。
He works in a hospital。
他在医院工作。
There are four fans in our classroom。
我们教室里有四个风扇。
二.否定句：含有否定词或表示否定意义词的句子。
例：
This is not my pen。
这不是我的笔。
He does not (doesn’t) work in a hospital。
他不在医院工作。
There are not (aren’t) four fans in our classroom。
我们教室没有四个风扇。
三.肯定变否定，有以下2种情况
1.有am / is / are，就在它们后面加 not。
am → amnot
is → isnot
are → arenot
比如：
Iama girl。→ Iam nota girl。
我是女孩。→我不是女孩。
2.没有 am / is /are, 但有表示动作的动词（比如eat），就在动词前加 don't 或 doesn't, 动词为原形。
V原→ don't + V原
V（-s, -es结尾） → doesn't + V原
eat →don'teat
eats→doesn'teat
比如：
Idrinkcola。
一般来说，把英语句子改为否定句，只要加上否定词not就可以了。
英语否定句是表示否定的句子，必须有否定词。有了否定词才算否定句。英语否定句是中国人学习英语的一个重点，也是一个难点。唯有突破这类难点，才能使我们的英语学习有质的飞跃。
1、句中有be动词(am/is/are/was/were)的，在be动词后加not。
如：I can swim.——I can't swim.
He is a math teacher. → He is not a math teacher.
2、句中有情态动词的(can/should/must/would)，在情态动词后面加not;
如：There will be a new building next year. → There will not be a new building next year. (will not可以缩写为won't)
3、句中没有be动词和情态动词的，在动词前加don't或doesn't
① 句中动词为原形的，加don't .如： I like apples. I don't like apples.
②句中动词为三单式的，加doesn't，并将三单式的动词还原成原形。
以上就是英语的否定句怎么写的全部内容，1、is：is not=isn'tare 2、are：are not=aren't 3、was：was not=wasn't 4、were：were not=weren't 5、am：am与not一般不缩写 6、be：be not be 读音：英 [bi] 美 [bi]释义：有，存在，位于。
