1、策划：学生双语报,1,情态动词,modal verb,Grammar ( 32ms ),策划：学生双语报,2,情态动词中的must, can, could, may, might都表推测。其中must的可能性最大，can / could次之，may / might最小。具体用法如下：,策划：学生双语报,3,must,1.Must 表示推测时，语气肯定，较有把握.,这个电脑肯定出了问题。(there),There must be something wrong with the computer.,你努力学了一整天， 一定累了吧,You have worked hard all day,so y
2、ou must be tired.,2,must表推测只能用于肯定句。,如表示“一定不、肯定不”的意思时，应用cant,He must know my address. 他肯定知道我的地址。（一定） He cant know my address. 他肯定不知道我的地址。（一定不）,策划：学生双语报,4,他一定有辆小汽车。 （现在）,他一定正在做练习。 （正在进行）,他一定已完成了工作。 （过去发生）,（3）must表示推测时，可以推测现在/正在发生的动作/过去发生的动作。,He must have a car now. (must do),He must be doing his exerc
3、ises. (must be doing),He must have finished the work.(must have done),策划：学生双语报,5,3.Must +have done 表示对过去发生的事情作出的肯定判断,他们在玩篮球， 他们一定完成了作业。,They are playing basketball, they must have finished their homework.,路是湿的。昨天晚上一定下雨了。,The road is wet. It must have rained last night.,策划：学生双语报,6,may/might,1.May/mig
4、ht表示推测时，表示把握不大。,她们明天可能会到这里来。,They may /might come here tomorrow.,2.may, might表推测时，可以用于肯定，否定句，意思是“可能不、也许不”He may / might not be at home. 他也许不在家。,策划：学生双语报,7,（3）may, might可以推测现在的动作，正在发生的动作或过去发生的动作。He may have a car.(现在)He may / might be sleeping . （正在发生）These students may / might have seen the film bef
5、ore.（过去） 这些学生以前可能看过这部电影。,注：在表推测中，might不表示过去时态，只是语气上比may更委婉，表示的可能性更小。,策划：学生双语报,8,can/could,1. can /could 表示推测时，只能用在否定句或疑问句中。,这个人不可能是玛丽， 她生病了。,It cant be Mary. She has fallen ill.,他们一定不在图书馆读书。,They cant be reading in the library.,cant + be doing：“不可能在做”,（2） can/could可以推测现在的动作，正在发生的动作或过去发生的动作。,They can
6、t know my address,策划：学生双语报,9,2. cant/couldt have done 对过去发生行为的可能性进行推测:,刚才我还看见他了， 所以他不可能出国的。,I saw him just now so he couldnt have gone abroad.,门是锁着的， 所以那时她不可能在家。(lock),The door was locked，so she couldnt have been at home then.,策划：学生双语报,10,. can/could, may/might和must表推测：,1、must：“一定、肯定”只用于肯定，其结构如下： mu
7、st + 动词原形：对现在情况的推测； must + be doing：对进行动作的推测； must + have done：对过去情况的推测；2、may/might：“也许、可能”用于肯定、否定， may/might + 动词原形： may/might + be doing may/might + have done （无否定）3、can/could：用于否定和疑问， cant/couldnt + 动词原形：“不可能” cant/couldnt + be doing：“不可能在做” cant/couldnt + have done：“不可能已经”,策划：学生双语报,11,1. I dont
8、know where she is, she _ be in Wuhan. 2. At this moment, our teacher _ our exam papers.（mark） 这时，我们老师一定在批改试卷。 3. The road is wet. It _ last night. (rain) 4. Your mother _ for you.你妈妈现在 一定在找你。,may,must be marking,must have rained,must be looking,策划：学生双语报,12,5. Philip _ seriously in the car accident y
9、esterday. 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 bus.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，因为早上他是坐 公共汽车来上班的。,may (might) have been hurt,may (might) have gone,cant have found,策划：学生双语报,13,4. What_ it be?-It_ be a mail box,
10、for it is moving. It_ be a car.A. can; cant; must B. can; can; mustC. can; mustnt; must D. must; mustnt; can,策划：学生双语报,14,6. I saw Mary in the library yesterday.-You_ her. She is still abroad.A. mustnt see B. cant have seen C. mustnt have seen D. couldnt see,策划：学生双语报,15,情态动词+have+done” 表“本来” 使用情形分析,一
11、、should have done过去本来应该 （而实际上并没有) should not have done 本不应该 而实际上却已经”如：1、We should have studied last night, but we went to the concert instead . 我们昨晚本应学习的，但我们却去看音乐会了。（实际上没有学习）,策划：学生双语报,16,二、could have done它表示过去本来能够 实际上没能做。如1、I could have run 100 metres in 12 seconds. 我本来能用12秒钟完100米的.（实际上没能）,策划：学生双语报,
12、17,三、neednt have done它表示过去已做的事，事实上没有必要。如，1、I need not have got up so early . 我本来不必要那么早起床的（事实上早已起床）2、I need not have waited for the train for an hour. 我本来不必要等一个小时的火车。（事实上已经等了一个小时）,策划：学生双语报,18,must have donemight/may have done cant/couldt have done could have done should have doneShouldnt have donenee
13、dnt have done,情态动词+have done：表示对过去发生的事进行推测,高考真题演练,一定做了,不可能做了,本可以做,本该做,本不必做，而做了,可能做了,本不应该做什么,策划：学生双语报,19,1. - She looks very happy. She _ have passed the exam. - I guess so. Its not difficult after all. A. should B. could C. must D. might2. She _ have left school, for her bike is still here. A. cant
14、B. wouldnt C. shouldnt D. neednt,策划：学生双语报,20,3. - Im sorry. I _at you the other day. - Forget it. I was a bit out of control myself.A. shouldnt shoutB. shouldnt have shoutedC. mustnt shoutD. mustnt have shouted,策划：学生双语报,21,4. You _ the exam, but you spent all your time playing.A. can pass B. could h
15、ave passedC. could pass D. can have passed,策划：学生双语报,22,4. -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,D,策划：学生双语报,23,情态动词考题:,1. -Did the train arrive in time?-No. It _ tw
16、o hours ago.A. must have arrived B. ought to have arrivedC. must arrive D. ought to arrive,B,策划：学生双语报,24,4. You _ such a long composition. The teacher only asked for 300 words. You have written 600. A. mustnt have written B. couldnt have written C. neednt have written D. do not have to write,C,策划：学生
17、双语报,25,归 纳 总 结,【注意】would 与used to 的区别：used to 强调今昔对比，过去的某种习惯，现在已经没有了；would 表示过去一段时间里有某种习惯，现在可能还有。试比较： We would sit in the yard every evening and listen to his story. (过去会这样，现在可能还这样) We used to sit in the yard every evening and listen to his story. (过去会这样，但现在不这样了),策划：学生双语报,26,Shall/should,1. Shall 用于
18、第一、三人称疑问句中，表示说话人征求对方的意见和向对方请示。 1)Shall we begin our class?（征求意见） 2)When shall Mike be able to leave hospital?(请示)2.shall 用于第二、三人称陈述句中，表示说话人给对方的命令，警告，允诺或威胁以及颁布法令规定。 1)You shall go with me.(命令) 2)He shall be punished.(威胁),策划：学生双语报,27,注意：should可表示“居然，竟然”。I cant believe such a gentleman should be so rud
19、e to the old.我不敢相信这样一个绅士居然对老人如此无礼。,策划：学生双语报,28,Need I do ? Yes, you must. No, you neednt.,dare & need,策划：学生双语报,29,问题 9 I _ walk on that road alone in the night when I was a child. A. didnt dare to B. dared not to He _ a thriller (恐怖片) alone at home. A. dares not to see B. doesnt dare to see,A,B,策划：学
20、生双语报,30,She _out alone at night. ( )A.dare not to go B. dares not go C. doesnt dare to go D. doesnt dares go,C,策划：学生双语报,31,need和dare,既能为情态动词又可以是实意动词(finish),I dont need _ the homework today.I neednt _ the homework today.Need I _ the homework today?Do I need _ the homework today?,to finish,finish,to finish,finish,策划：学生双语报,32,注意对need问句的回答: -Need I finish the work today? -Yes, _. No, _. No, _.,you must,you neednt,you dont have to,
