你不应该帮助他那么多。
十、 “need+have+done”表示本来需要做某事而没有做。“needn’t+have+done”则表示“本来不需要做某事而做了”。
1.There was plenty of time. She needn’t have worried.
有充足的时间,她没必要那么着急。
2. He need have hurried to the station. In that case, be wouldn't have missed the train. 他本来需要快点去车站,那样的话,他就不会误了火车。
巩固练习
1. They _____ have arrived at lunchtime but their flight was delayed. (2011全国)A.will
B.can
C.must
D.should
2. If you ______ smoke, please go outside. (2011 全国)
A. can
B. should
C. must
D. may
3. ——I don’t really like James. Why did you invite him?
——Don’t worry. He ____ come. He said he wasn’t certain what his plans were. (2011 北京)
A. must not
B. need not
C. would not
D. might not
4. Some young people these days just ______ go out of their homes to contact the real world.
(2011 上海)
mustn’t
B. won’t C. mightn’t
D. shouldn’t
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