5) 用于表示过去经常性的行为或动作:
例:The retired captain would sit hours on end watching ships sailing past.
He would go to bed strictly at 9, and on Sundays would not have lunch anywhere except in that restaurant.
4. should的用法:
1) 用于表示应该或不应该的概念。此时常指长辈教导或责备晚辈:
例:You should be here with clean hands.
例:1989年1月四级第45题
With all this work on hand, he _______ to the cinema last night.
A) mustnt B) oughtnt to go
C) wouldnt go D) shouldnt have gone
全句的意思是:他手头又这么多工作,昨夜不该看电影。本句表达的是昨天已经发生但去不该发生的事情,所以应该用情态动词should的否定式,后接动词的完成式。因而答案是D) shouldnt have gone。
2) 用于提出意见劝导别人:
例:It would be better if the three of you should work as a team.
To keep your work, you should prove yourself a resourceful investigator.
3) 委婉地对别人提出建议或劝告通常用I should / shouldnt if I were you句型:
例:I should hand in a typewritten paper if I were you.
I shouldnt worry at all if I were you.
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