一般否定句：I don't know this. No news is good news.特指否定：He went to his office, not to see him. I am sorry for not coming on time.部分否定 ：否定詞加表示全體的詞：I don't know all of them.

否定句例子

（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.

否定句改變方法

表示某一否定意思。句中一定有not。

有三種可能:be動詞(am、is、are、was、were)+not、情態(tài)動詞(can、must、should)+not、助動詞(do、does、did)+not

1.看句中有無be動詞，如有,直接在be動詞后+not。

2.看句中有無情態(tài)動詞，如有,直接在情態(tài)動詞后+not

3.如上述二者都沒有,就應用助動詞+not

分四個步驟:

(1)肯定陳述句中本來是沒有助動詞的,要加上去,位置在主語(某人或某物)后,動詞前。

(2)確定助動詞用do、does還是did,根據(jù)句中動詞,動詞是原形的助動詞就用do,動詞是第三人稱單數(shù)的助動詞就用does,動詞用過去式的助動詞就有did。

(3)在助動詞后加not。

(4)原句中動詞假如發(fā)生變化就要恢復成原形。