Question

怎样改英语否定句(方法)

Answer 1

Answer 2

先简单说下动词的分类
Be动词：is, am, are, was, were
情态动词：can, must, may, should, 等
助动词：do, does, did, has, have, had 动词
要根据句中动词的不同，来改否定句

下面我总结了下列几种情况，帮助你改否定句
先来点简单的
如果句子中有be动词、情态动词和助动词时可以再be动词、情态动词和助动词后加not
例如：I am a teacher．→I am not a teacher．
She can help me．→She can't help me．
Yes,I do.→No,I don't.

如果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。
例如：The little girl wants to go there．
→The little girl doesn't want to go there．
He did his work yesterday．→He didn't do his work yesterday．

再来点扩展的

如果是祈使句变否定句时，一般在句首加Don't，但Let us或Let's开头的祈使句在 Let us或 Let's后加not即可。
例如：Put them over there．→Don't put them over there．
Let us go home．→Let us not go home．
如果主从复合句中，主句是I think，I believe等结构，变否定句时，形式上否定主句，实际上否定从句。
例如：I think chickens can swim ．我认为鸡会游泳。
→I don't think chickens can swim ．我认为鸡不会游泳。

如果剧中有“had better ＋动词原形”，变否定句时为“had better not ＋动词原形”。
例如：You'd better go to school．→ You'd better not go to school．

动词不定式变否定式时，常在不定式to前加not。
例如：The teacher tells me to do it．→The teacher tells me not to do it．

如果句中有使役动词和感官动词（make，let，hear，see，watch等）后接省略to的不定式，此种不定式变否定句时只需在省略to的动词原形前加not。
例如：I saw her work．→I saw her not work．

特殊形式的否定句，有以下几种：
（1）肯定句含有every-的合成词时，变否定句时改为no-。
如：Everything is ready．→Nothing is ready．

（2）肯定句中含有always， usually和ever时，变否定句时改为never。
如：He is always late for school．→He is never late for school．

（3）肯定句含有many，much时，变否定句时分别改为few，little。
如：Many students know him．→Few students know him．

（4）肯定句中含有still时，变否定句时应改为no longer。
如：Tom is still in bed．→Tom is no longer in bed．

（5）肯定句含有both， both．．．and，all时，变否定句时应改为never，neither．．．nor，none。
如：Both of us are students．→Neither of us is a student．

（6）肯定句含有nearly， almost时，变否定句时应改为 hardly。
如：Lily nearly knows him ．→Lily hardly knows him ．

（7）肯定句含有“形容词＋ enough”时，变为否定句时应改为“too ＋形容词的反义词”。
如：He is short enough to reachit．He is too tall to reach it．

Answer 3

1.有系动词be（am,is,are,was,were）的,在后面加not;
2.有情态动词can,may,must等的，在后面加not;
3.已经有了助动词的，在后面加not;
4.没有前面三种情况的，要用到助动词do,does,did加not，放在动词原形前面；
5.特别情况，有些句子本身有不定代词做主语或者宾语了的，可以把不定代词改为否定就可以。