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帶否定詞not的否定句

1. 在含系動(dòng)詞be、助動(dòng)詞be, have, has, will, would, shall, should等之后直接加not，構(gòu)成否定句。如：

(1) He is there. — He is not there. 他不在那兒。

(2) I have finished my work. — I have not finished my work. 我的工作還沒(méi)完成。

(3) She will agree with you. — She will not agree with you. 她不會(huì)同意你的意見(jiàn)。

2. 否定含情態(tài)動(dòng)詞的句子：

a. 在情態(tài)動(dòng)詞can, could, may, might, must, need, dare, had better, would rather的句子之后直接加not。如：

(1) He can say so. — He can not say so. 它不會(huì)那樣說(shuō)。

(2) Students must smoke. — Students must not smoke. 學(xué)生不允許抽煙。

(3) You’d better go there now. —You’d better not go there now. 現(xiàn)在你最好不要去那里。

(4) I’d rather tell you the truth. — I’d rather not tell you the truth. 我倒想不告訴你真相。

(5) He dared ask his parents for money again. — He dared not ask his parents for money again. 他不敢向父母親要錢。

b. 在含情態(tài)動(dòng)詞ought to的句子，在ought to中的to前面加not，構(gòu)成否定句。如：

(1) You ought to bother him. — You ought not to bother him. 你不應(yīng)該去麻煩他。

(2) You ought to waste your time. — You ought not to waste your time. 你不應(yīng)該把時(shí)間浪費(fèi)了。

c. 在含情態(tài)動(dòng)詞used to的句子，可在used to中的to前面加not；也可在used前面加 did not，同時(shí)將used 改為use。如：

(1) He used to smoke in the past . — He used not to smoke in the past. 他過(guò)去不常抽煙。

(2) He used to live here. — He did not use to live here. 他原來(lái)常不住這里。

d. 在含情態(tài)動(dòng)詞have / has / had  to的句子，在have / has / had to前面加do not的適當(dāng)形式, 同時(shí)將has / had 改為have。如：

(1) You do have to stay here after school. — You do not have to stay here after school. 你不必放學(xué)后還呆在這里。

(2) He had to go to work yesterday. — He did not have to go to work yesterday. 他昨天不必去上班。

3. 對(duì)于不含系動(dòng)詞be、助動(dòng)詞或情態(tài)動(dòng)詞的句子，則在謂語(yǔ)動(dòng)詞前加do not的適當(dāng)形式, 同時(shí)將原謂語(yǔ)動(dòng)詞改為原形。如：

(1) He likes classic music. — He does not like classic music. 他不喜歡古典音樂(lè)。

(2) She played table tennis yesterday afternoon. — She did not play table tennis yesterday afternoon. 她昨天下午沒(méi)有打乒乓球。