Question

I am a teacher.怎么改成否定句

Answer 1

　　I am a teacher.改成否定句：I am not a teacher.
　　肯定句变否定句方法：
　　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。如：I am a teacher．→I am not a teacher．He can help me．→He can't help me．
　　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。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．
　　3．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。如：Put them over there．→Don't put them over there．Let us go home．→Let us not go home．
　　4．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。如：I don't think chickens can swim．我认为鸡不会游泳。
　　5．“had better＋动词原形”，变否定句时为“had better not＋动词原形”。如：You'd better go to school．→You'd better not go to school．
　　6．动词不定式变否定式时，常在不定式to前加not。如：The teacher tells me to do it．→The teacher tells me not to do it．
　　7．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。如：I saw her work．→I saw her not work.

Answer 2

肯定句：I am a teacher.
否定句：I am not a teacher.

把肯定句改成否定句分以下情况：
1、句中有be动词的，在be动词后加not；
2、句中有情态动词的（can ,should，must ，would），在情态动词后面加not；
3、 句中没有be动词和情态动词的，在动词前加don’t或doesn’t ；
4、.肯定句中的some在否定句中应改为any。

Answer 3

I am not a teacher.

Answer 4

在αm后面加not

Answer 5

I'm not a teacher·