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简介
这是高中情态动词ppt，包括了表示推测——情态动词的重要用法，巩固练习，可兼做行为动词的情态动词：need、dare，Exercises等内容，欢迎点击下载。
高中情态动词ppt是由红软PPT免费下载网推荐的一款课件PPT类型的PowerPoint.
Grammar 情态动词 Must +have done 表示对过去已经发生的行为进行推测，意为“想必/准是/一定作了某事”。 1.We must have learned 2，000 words by the end of last term. 到上学期为止我们一定学了有两千个单词 。 2.He must have gone to Beijing. 他一定已经去北京了。 can/could+have done表示对过去的行为的怀疑和不肯定，通常用在否定句和疑问句中。 1. Can they have won the basketball match? 他们可能赢了篮球赛吗？ 2. It couldn’t have been Mr. Green. He has gone to New York. 那不可能是格林先生的，他已经去北京了。 could(不用can)+have done，在肯定句中表示“本来能够…而没能…”，具有婉转的批评和责备之意。 You could have told me earlier. 你本该早点告诉我的。 should/ought to+have done用于肯定句时，表示“本该做某事而实际上没做”，用于否定句时，则表示“不该做的事反而做了”。 1.You should have told him a week ago. 你本来应该在一周前告诉他的。 might（不用may）+have done表示“本来可能…”，但实际上没有发生的事。另外，还可表示“本来应该或可以做某事”之意，含有轻微的责备语气。 1.You might not have told her. 你本可以不告诉他的。（事实上你告诉他了） 2. You might have come earlier. 你本可以早点来的。（但没有这样） needn’t +have done表示做了本来不必去做的事。 1.She needn’t have gone to the station yesterday. 昨天她本不必到火车站去的.（昨天她去了） 2.You needn’t have bought it. 你本可不必买它的。 （你买了） 巩 固 练 习 1.Oh， I’m not feeling well in the stomach. I ____ so much fried chicken just now. A. shouldn’t eat B. shouldn’t have eaten C. mustn’t eat D. mustn’t have eaten 2.---Why hasn’t Jane arrived yet? ---She ____ again in the morning? A. shouldn’t have overslept B. may have turned off the alarm clock C. must have no one t o call her D. should have someone to wake her up 3.---Did you go to the movie the day before yesterday? ----No. We ___， but we decided not to. A.should have gone B. could go C. should go D. could have gone 1．The flower is dead. I _______ it yesterday. A．should water B．must water C．should have watered D．mustn’t have watered 2．What time ought I _______? A．arrived B．arriving C．arrive D．to arrive 3．He _______ speak to his mother like that. A．ought not to B．doesn’t ought to C．not ought to D．ought to not 4．I don’t think we’d better _______ it any more. A．discuss B．discussing C．to discuss D．discussed 5．You ought to _______ him， but you didn’t. A．help B．helped C．helping D．have helped
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