高中英语复习北师大版《情态动词+have done》ppt课件

1、情态动词第二讲情态动词第二讲 情态动词+have done 许昌建安区一高 孙慧超情态动词情态动词have done情态动词情态动词have done Review Must,may和cant+do/be doing 是对什么时候的事情进展推测？ 1.Tom cant be at home at present.There is nobody to answer the phone. 2.My sister went to the cinema an hour ago.Now she must be seeing a film.must+have+done 表示对过去事情的一定推测，译成一定做

2、过某事，该构造只用于一定句。 1. It must have rained last night, for the ground is wet. 昨晚一定下雨了，由于地面还是湿的。 2.You must have been mad to speak to the criminal. 他和罪犯说话，一定是发疯了。 may/might+have+done 表示对发生过的事情的推测，意思是“能够曾经或“也许曾经，用于一定句中。 What has happened to George? I dont know. He may have got lost. 乔治发生了什么事？ 我不知道，他能够迷路了 S

3、he might have achieved greater progress, if you had given her more chances. 假设他多给她点时机，她能够曾经获得更大的成果。cant+have+done 表示对过去事情的否认推测，译成“不能够做过某事 1. Mr. Smith cant have gone to , for I saw him in the library just now. 史密斯先生不能够去北京了，我刚刚还在图书馆见过他。 2. Mary cant have stolen your money. She has gone home. 玛丽不能够偷他的

4、钱，她回家去了。could+have+done 是虚拟语气，表示对过去事情的假设，意思是本来可以做某事而没有做 . He could have passed the exam, but he was too careless. 本来他可以经过考试，但是他太大意。 Should/shouldnt+have+done should+have+done意思是“本来应该做某事，而实践没做。 “ shouldnt+have+done 表示本来不应该做某事，而实践做了。含有指摘对方或自责的含意。 The work should have been finished yesterday. 这项任务本来应该昨

5、天就做完的。 Tom is crying. I shouldnt have been so harsh on him. 汤姆哭了，我本来 不应该对他如此严峻。 neednt have done 表示“做了本来不用做的事情，通常不用于一定句。例如：Its only five minutes walk. We neednt have taken a taxi.只需5分钟的步行路程，我们本不用乘出租车的。It is warm today. You neednt have worn your coat.今天天气暖和，他本来不用穿大衣的。情态动词have done 高频考点高频考点深化突破深化突破 考点

6、诠释考点诠释 对点演练对点演练 should/wouldcouldneednt情态动词have done 高频考点高频考点深化突破深化突破 mustcouldneedcouldmightmust考点诠释考点诠释 对点演练对点演练 1. Do you know where David is? I couldnt find him anywhere. Well, he _ have gone far, for his coat is still here. A. shouldnt B. mustntC. cantD. wouldnt 2. He _ you more help, even thou

7、gh he was busy. A. might have given B. might not give C. may not have given D. may give 3. There was plenty of time. She _. A. mustnt have hurried B. couldnt have hurried C. mustnt hurry D. neednt have hurried 4. Tom graduated from college at a very young age. Oh, he _ have been a very smart boy then. A. could B. Should C. might D.must 5. My English-Chinese dictionary has disappeared. Who _ have taken it? A. shouldB. mustC. couldD. shall 6. I really worried a