1.主系表結(jié)構(gòu)的句子
I am a teacher.----- I am not a teacher.
He is in Beijing.----- He is not in Beijing.
We are classmates.----- We are not classmates.
It was cold yesterday.----- It was not cold yesterday.
這些句子中都有系詞,am,is,are,was,were,只要在系詞后面+not ,就變成否定句了.
2.主謂賓的句子
He runs fast.----- He doesn't run fast.主語(yǔ)是三單人稱,do也要用三單形式does
They learn from me.------ They don't learn from me.
We went to school by bike .----- We didn't go to school by bike.謂語(yǔ)動(dòng)詞是過去式,do也要變過去式did
這些句子中都有謂語(yǔ)動(dòng)詞,只要在主語(yǔ)后面+do的適當(dāng)形式+not 就行了.
3.句中有助動(dòng)詞或情態(tài)動(dòng)詞的
I will get up earlier tomorrow.----- I will not get up earlier tomorrow.
She can dance well.----- She can't dance well.
He has gone abroad.------ He has not gone abroad.
只需要在助動(dòng)詞或情態(tài)動(dòng)詞后面直接+not ,就可以變否定句了.
OK?希望能幫到你啊!