情态动词完成时的推测市公开课金奖市赛课一等奖课件

1、第1页 Why is the road so wet?It must have rained last night.第2页A: Where are the girls? Can they have gone home?B: No, they cant have gone home. Its so early.第3页-Look, the lights are off in their room.-Where have they gone?-They might have gone to the cinema.第4页A: Here is a doll for your daughter.B: Th

2、ank you so much. Its beautiful. But you neednt have bought it. She has so many at home.第5页Finding the ruleModal verbs + have doneExplanationsExample sentencesmust have doneIt must have rained last night.Believing what happened in the past is the case (used only in positive sentences)第6页can/could hav

3、e done -Where is John? Can he have gone to the playground?-No, he cant have gone to the playground. It is raining.indicating that something was a possibility in the past , though it did not actually happen (negative or interrogative sentences)第7页may/might have doneThey might have mistaken you.Sugges

4、ting that it is possible that something happened or was true (used only in positive/ negative sentences)第8页should/shouldnt have doneYou should have done your homework first.indicating that something did not / did happen, but the speaker wishes it had (not) happened.第9页neednt have doneYou neednt have

5、 watered the plant. It rained last night.indicating that it is not necessary for sb. to do sth, though he / she did it.第10页 must have done对过去非常必定推测（语气最强）第11页对已发生过去情况推测，若陈说句谓语部分有“must have done”，而且有表示过去时间状语, 问句部分用didnt； 1) They must have gone there last night, didnt they? 第12页2)They must have arrived

6、 by now, havent they?对已发生过去情况推测，若陈说句谓语部分有“must have done”，若没有表示过去时间状语，问句部分用havent 或hasnt .第13页3) He must have been to the Great Wall,hasnt he? 对已发生过去情况推测，若陈说句谓语部分有“must have done”，若没有表示过去时间状语，问句部分用havent 或hasnt .第14页这个房间昨天必定被清扫了。The room _ _ _ _ yesterday. must have been cleaned第15页他一定已经背了5000单词了。He

7、 _ _ _ 5,000 words.must have learnt第16页You must have seen the film “Journey to the West” , _ _? havent you第17页They must have been to the World Expo last week, _ _? didnt they第18页 can have done对过去疑问推测 cant have done对过去否定推测疑问句和否定句第19页-Where is John? Can he have gone to the playground?-No, he cant have

8、 gone to the playground It is raining.第20页- _Mr King _the letter?金先生已经收到那封信了吗？-No, he _it.不，他不可能收到。Canhave receivedcant have received第21页may/might have done某事有可能发生过(表示对过去不太必定推测，语气比must have done 弱)用于必定句和否定句(may语气比might稍强)第22页-Where did Adam get that new football? He hasnt got any money. -It _ a pres

9、ent. After all, it was his birthday last week. A. might have been B. might be 第23页He _out because the light was on.A. may not have gone B. may have not goneC. may not go D. must not have gone第24页neednt have done本没有必要做某事（但此事已做）第25页We _the plant because it rained last night. (本无必要)neednt have watered第

10、26页shouldnt have done本不该做某事（但此事已做）表示责备第27页He should have repaired the bike yesterday.should have done本应该做某事（但此事未做）表示责备 第28页Oh, Imnotfeelingwellinthestomach. Ishouldnt have eaten so much fried chicken just now. 第29页你本应该先完成你作业。You _ _ _ your homework first. should have finished第30页你本不应该跟我撒谎。You _ _ _t

11、o me.shouldnt have lied第31页高考例析 1. Sorry Im late. I _ have turned off the alarm clock and gone back to sleep again. （ 北京春季）A. might B. should C. can D. will 答案为 A。表推测用法。句意：对不起, 我迟到了。我(当初)兴许是关了闹钟又回去睡觉了。might 相当于 may, 但语气更加不愿定。第32页2. I was really anxious about you. You_ home without a word. (01 全国)A.

12、mustnt leaveB. shouldnt have left C. couldnt have left D. neednt leave 答案为 B。虚拟语气使用方法。句意：我（那时）真地很担心你。你本不应该不留个话就离开家。第33页3. Ill tell Mary about her new job tomorrow. You_ her last week. （04 福建）A. ought to tell B. would have told C. must tell D. should have told答案为 D。虚拟语气使用方法。句意：-我明天要告诉她我新工作情况。 -你本应该上周

13、告诉她。第34页4. Tom graduated from college at a very young age. Oh, he _ have been a very smart boy then. （04 全国IV） A. could B. should C. might D. must答案为 D。表推测使用方法。句意：汤姆很年轻时候就大学毕业了。哦，他必定是一个很聪明男孩儿。 第35页5. He _ have completed his work; otherwise, he wouldnt be enjoying himself by the seaside. (05 北京卷) A.

14、should B. must C. wouldnt D. cant答案为 B。使用方法同4题。句意：他必定做完了工作，不然他就不会在海边痛快地玩儿了。 第36页6. Do you know where David is? I couldnt find him anywhere. Well. He _ have gone farhis coats still here. （05湖北卷） Ashouldnt Bmustnt Ccant Dwouldnt答案为 C。表推测使用方法。句意：你知道大卫在哪儿吗？我哪儿也找不到他。瞧，他不可能走远他上衣还在这儿呢。cant 相当与 couldnt，但后者语

15、气愈加委婉。 第37页练习 The woman biologist stayed in Africa studying wild animals for 13 years before she returned. Oh, dear! She _ a lot of difficulties! (05 江苏卷) A. may go through B. might go throughC. ought to have gone through D. must have gone through第38页2. I have lost one of my gloves. I _ it somewhere

16、. （05 北京春季）A. must drop B. must have dropped C. must be dropping D. must have been dropped 第39页3. Mr. White _ at 8:30 for the meeting, but he didnt show up. （04 广西） A. should have arrived B. should arriveC. should have had arrived D. should be arriving4. He paid for a seat, when he _ have entered free. （05 山东卷）A. could B. would C. must D. need第40页5. Tom is never late for work. Why