表示责备或遗憾的情态动词能有这种用法的情态动词有五个三类：只用于否定句的need；只用于否定句的could和might；既可用于肯定句又可用于否定句的should和ought to。

后面都接“have＋过去分词”。

◎ needn’t have done本不必做某事但却做了(做了不必做的事)◎ could / might have done本可以做某事但却没做 (没做可以做的事)注意：此用法不可用can / may◎ ought to / should have done本应该做某事但却没做 (没做该做的事)oughtn’t to / shoudn’t have done本不该做但却做了(做了不该做的事)考题实例：1.

—I’ll tell Mary about her new job tomorrow.

—You ________ her last week.

(福建卷)A.

ought to tell B.

would have toldC.

must tell D.

should have told【分析】答案选D.

表示轻微的责备，“你本应该上个星期就告诉她的(但你却没有)”。

2.

We ________ last night, but we went to the concert instead.

(全国卷)A.

must have studied B.

might study C.

should have studied D.

would study 【分析】答案选C.

表示自责或后悔“昨晚我们本应该学习的，但却…”3.

Tom ought not to ________ me your secret, but he meant no harm.

(全国卷)A.

have told B.

tell C.

be telling D.

having told【分析】答案选A。

指汤姆做了不该做的事。



nmet1687.

4.

I was really anxious about you.

You ________ home without a word.

(全国卷)A.

mustn’t leaveB.

shouldn’t have left C.

couldn’t have leftD.

needn’t leave【分析】答案选B。

表示轻微的责备，说对方做了不该做的事。

5.

He ________ you more help, even though he was very busy.

(全国卷)A.

might have givenB.

might give C.

may have givenD.

may give【分析】答案选A。

轻微地指责他没做该的事。

“他本可以给予你更多帮助的，即使他当时很忙。

”此种用法不可用may。



nmet1687.

6.

There was plenty of time.

She ________.

(全国卷)A.

mustn’t have hurriedB.

couldn’t have hurriedC.

must not hurryD.

needn’t have hurried【分析】答案选D。

由there was plenty of time推知，她当初“本不必那么匆忙的”。

表示做了不必做的事用needn’t have done。

【表示责备或遗憾的情态动词查看网站：[db:时间]】