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1、会计学1高中高中(gozhng)英语语法情态动词英语语法情态动词第一页，共31页。第1页/共31页第二页，共31页。must have done 表示对过去肯定已经表示对过去肯定已经(y jing)发生的行为进行推测，意为发生的行为进行推测，意为“想必想必/准准是是/一定作了某事一定作了某事”。 (用于肯定句中用于肯定句中)第2页/共31页第三页，共31页。4cant/couldnt have done（不可能（不可能(knng)）表示对过去的行为的怀疑和不肯定，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。通常用在否定句和疑问句中。第3页/共31页第四页，共31页。may/mig
2、ht (not) have done或许或许/可能做可能做用来推测过去用来推测过去(guq)可能发生过某种情况可能发生过某种情况 (用于肯定或否定句中用于肯定或否定句中)第4页/共31页第五页，共31页。Modal verbs+be adj./n.Modal verbs+be doing表示对现在/将来状态或正在进行情况推测1.must be/be doing：表示对现在/将来状态或正在进行的动作(dngzu)肯定推测(用于肯定句中)1）-I had no sleep for about 48 hours -You must be exhausted.2)Judging by your beh
3、aviour,you must be a doctor.3)The police are stopping all cars. They must be looking for the escaped prisoner.第5页/共31页第六页，共31页。 2.may/might be/be doing表示对现在(xinzi)/将来状态或正在进行的动作可能推测1）I wonder why Tom hasnt answered my letter. He may/might be ill.2)He may be doing his homework now.Please dont call him
4、.3)I dont know where professor Brown is.He may be in his garden, watering the flowers.第6页/共31页第七页，共31页。3.cant/couldnt be/be doing表示对现在/将来状态或正在进行的动作(dngzu)肯定推测用于否定句中，Can/Could be/be doing用于疑问句中1）Can I have some sweets? You cant/couldnt be hungry.You have just had dinners.2) Can he be sleeping? No, he
5、 cant be sleeping.第7页/共31页第八页，共31页。 总结1.疑问句:Can/Could+be/be doing/have done2.否定句:cant/couldnt+ be/be doing/have done不可能(knng) may/might+ not be/be doing/have done可能(knng)不3.肯定句：must/may/could/might+ be/be doing/have done4.mustnt have done,can have done不可能(knng)存在5.-Can the book be hers? -Yes, it mus
6、t be. No,it cant be/it couldnt be.第8页/共31页第九页，共31页。肯定肯定否定否定疑问疑问mustshouldmaymightcouldcan？modal verbs: possibility第9页/共31页第十页，共31页。表示推测表示推测情态动词的重要情态动词的重要(zhngyo)用法用法.肯定的推测肯定的推测可能可能(knng)的推测的推测否定的推测否定的推测疑问的推测疑问的推测must 对将来 对现在(xinzi) 对过去情态动词情态动词may, might cant, couldntcan, could + be + be + have done常
7、见常见must be + be doing + be + be + have done + be doing 可以用可以用not表示表示“可能不可能不” +be + be + have done + be doing+ be + be + have done + be doing第10页/共31页第十一页，共31页。判断判断(pndun)1: must “一定一定”他一定住在这里他一定住在这里.He must live here.他在郊区他在郊区(jioq)有栋别墅。他一定很有钱。有栋别墅。他一定很有钱。He has a villa in the suburb. He must be very
8、 rich.他很熟悉这里。他一定在这里住过。他很熟悉这里。他一定在这里住过。He knows the place well. He must have lived here.他昨晚一定吃了安眠药。今天他一直睡到午饭时才醒。他昨晚一定吃了安眠药。今天他一直睡到午饭时才醒。He must have taken sleeping pills last night. He didnt wake up until lunch time today. 第11页/共31页第十二页，共31页。判断判断(pndun)2: may/ might/ could (not) “可能可能(不不)”1. - I wond
9、er why Mary isnt here today. - She _ (may, be) ill. - She _ (may, fall) ill.2. She is often careless. She _ off the light (也许也许(yx)没有关灯没有关灯).3. 也许也许(yx)有人把这个消息告诉了有人把这个消息告诉了Jane。Jane may have been told the news already.may bemight have fallenmay not have turned第12页/共31页第十三页，共31页。判断判断(pndun)3: cannot
10、/ could not “不可不可能能”1. - Is that John? - It _ (不可能不可能(knng)是是) John; he has gone to Paris.2. John _ (不可能不可能(knng)得知得知) the sad news; he looks very happy.3. - I hear John won the first prize in yesterdays singing contest. - It _ (不可能不可能(knng)是是) John: he went to Paris yesterday morning.cant becouldnt
11、 have learnedcant have been第13页/共31页第十四页，共31页。A: Where is my watch? I cant find it anywhere.B: You _ (may, leave) it in the library.A: No, it _ (can, not, leave) there, for I clearly remember that I looked at my watch when I left the library.B: Then you _ (must, leave) it on the playground.A: Oh, I
12、remember I took it off and put it on my desk when we went out. It _ (must, steal).may have leftcouldnt have been leftmust have leftmust have been stolen第14页/共31页第十五页，共31页。Translation Exercise1. 他还未到，一定是没赶上他还未到，一定是没赶上(n shn)火车。火车。 He isnt here. He must have missed the train. 2. 你可能在报上已经读到这件事了。你可能在报上已
13、经读到这件事了。 You may / might have read about it in the newspaper. 3. 他有可能到那里去了呢？他有可能到那里去了呢？ Where can /could he have gone? 4. 别信他。他说的一定不是真的。别信他。他说的一定不是真的。Dont believe him. What he said cant be true. 第15页/共31页第十六页，共31页。neednt have done (过去过去(guq)本来不必做本来不必做(没有没有(mi yu)必要做而实际上也没做必要做而实际上也没做).第16页/共31页第十七页，共
14、31页。should /ought to have done (过去过去)本应该做本应该做(而实际上未做而实际上未做),用于否定句用于否定句时则表示过去不该做的事反而做了时则表示过去不该做的事反而做了(带有后悔、埋怨或责备带有后悔、埋怨或责备(zbi)的语气）。的语气）。第17页/共31页第十八页，共31页。5. Philip _ seriously in the car accident. 菲利普可能在车祸中受了重伤菲利普可能在车祸中受了重伤.6. -Linda has gone to work, but her bicycle is still here.-She _ (go) by bu
15、s.7. Mike _ his car, for he came to work by bus this morning.迈克一定还没有找回他的车，因为早上迈克一定还没有找回他的车，因为早上(zo shang)他是坐他是坐 公共汽车来上班的。公共汽车来上班的。may (might) have been hurtmay (might) have gonecant have found第18页/共31页第十九页，共31页。第19页/共31页第二十页，共31页。第20页/共31页第二十一页，共31页。should have done 本应该本应该(ynggi)做做shouldnt have done
16、 本不应该本不应该(ynggi)做做ought to have done 本应该本应该(ynggi)做做ought not to have done 本不应该本不应该(ynggi)做做neednt have done 本不必做本不必做could have done 本可以做本可以做might have done 本可以做本可以做第21页/共31页第二十二页，共31页。1. He must be in the room, _?2. Mary must be reading in the library, _?3. He must have been to New York, _?4. He ma
17、y have gone to Beijing last week, _?5.They couldnt have gone out because the light was on, _?6. They must have been doing 120 km an hour when they passed me, _?7. She must have learned Chinese before she came to China, _?isnt heisnt shehasnt hedidnt hedid theywerent theyhadnt she第22页/共31页第二十三页，共31页。
18、BBA第23页/共31页第二十四页，共31页。4.As it turned out to be a small house party, we _ so formally.A. neednt dress B. didnt have to dress upC. Might not have dressed up D. neednt have dressed up5.Im rather surprised you havent reported him to your teacher. In my opinion, you _ this as soon as you found out he wa
19、s cheating.A. must have done B. might have done C. should have done D. could have done DC第24页/共31页第二十五页，共31页。请把下列请把下列(xili)词语组合成句词语组合成句:1. _, ( play, interesting, must, be, new, the ) for the director is so famous.2. See how happy he is today! _ _. ( failed, he, cant, in, the, have, exam )3. Peter i
20、snt in the classroom. _ _. ( may, playing, he, with, be, his, basketball, friends ) The new play must be interesting He cant have failed in the exam He may beplaying basketball with his friends第25页/共31页第二十六页，共31页。1. 我本应当早一点完成这项工作的。我本应当早一点完成这项工作的。 I should have finished the work earlier. 2. 你本来可以更细心的
21、。你本来可以更细心的。 You could (might) have been more careful. 3. 他本不必为此事担心。他本不必为此事担心。 He neednt have worried about it. 4. 昨天的聚会非常有意思。你本应该来昨天的聚会非常有意思。你本应该来,为何为何(wih)不来呢？不来呢？ There was a lot of fun at yesterdays party. You ought to have come, but why didnt you? 第26页/共31页第二十七页，共31页。高考高考(o ko)考题考题:1. I thought
22、you _like something to read, so I have brought you some books. A. may B. might C. would D. must 2. Where is my pen? I _it. A. might lose B. would have lost C. should have lost D. must have lost3. I didnt hear the phone. I _asleep A. must be B. must have been C. should be D. should have beenB D B 第27
23、页/共31页第二十八页，共31页。4. -There were already five people in the car, but they managed to take me as well. -It _a comfortable journey A. cant be B. shouldnt be C. mustnt have been D. couldnt have been 5. Its nearly seven oclock . Jack _be here at any moment. A. must B. need C. should D. could D D 第28页/共31
24、页第二十九页，共31页。第29页/共31页第三十页，共31页。 1. I dont know where she is, she _ be in Wuhan. 2. At this moment, our teacher _ our exam papers. 这时，我们老师想必在批改这时，我们老师想必在批改(p gi)试卷。试卷。 3. The road is wet. It _ last night. (rain) 4. Your mother _ for you.你妈妈一定一直在找你。你妈妈一定一直在找你。maymust be markingmust have rainedmust have been looking第30页/共31页第三十一页，共31页。