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1、一 情态动词表推测;二 情态动词+have done；三 解题技巧,情态动词,Lets read and translate the sentences!,She couldnt/cant be so stupid to do that.I may be busy from tomorrow on.You must be tired after working so long.She shouldnt be out in such an early morning.,她不可能去做那种事吧。,从明天起我可能会忙起来。,你工作这么久以后肯定累了吧。,她不会这么一大早就出去。,情态动词表推测,一、情
2、态动词表推测,1.肯定的推测一般用must,should,ought to,may（might）或could（不用can），其中，_的语气最强，译为“肯定”、“准是”、“想必是”；_的语气次之，译为“很可能”、“应该”，指按常理推测；_的语气最弱，译为“也许”、“可能”。,must,should/ought to,may（might），could,-Are you coming to Jeffs party?-Im not sure.I _ go to the concert instead.A.must B.would C.should D.might-Hi,tom.Any idea whe
3、re jane is?She _ in the classroom.I saw her just now.A.shall be B.will be C.must be D.can be,According to the speed,the car _ arrive at Shanghai before it gets dark.A.shall B.should C.must D.need,should表推测时，“按道理该如此”，一般句末有时间状语，或有语境暗示。,Its 8 oclock now.He should be in the office now.Hi,Mum!Im on the b
4、us.I should be home in about ten minutes.,注：can 有时也用于肯定句中表示推测，主要用于表示理论上的可能性(即从理论上看是可能的，但实际未必会发生)，或表示“有时”之意。如：Even experienced teachers can make mistakes._Food poisoning can cause death._,即使是有经验的教师也可能出错。,食物中毒可导致死亡。,Read and translate:,1.It is usually warm in my hometown in March,but it _ be rather co
5、ld sometime.A.must B.can C.should D.would2.Its nearly seven oclock.Jack _ be here at any moment.A.shall B.should C.can D.must,2.否定推测分为两种情况：,1）语气不很肯定时，常用may not,might not，译为_ 2）否定语气较强时，则用_，译为“根本不可能”、“想必不会”，与_的意思刚好相反。,可能不、也许不,cant,must,1.-Is John coming by train?-He should,but he _ not.He likes drivin
6、g his car.A.must B.shall C.may D.need 2.Isnt that Anns husband over there?No,it _ be him.Im sure he doesnt wear glasses.A.cant B.must not C.wont D.may not,3.疑问句中的推测，往往用can或could。,Mr.Bush is on time for everything.How _ it be that he was late for the opening ceremony？A.can B.should C.may D.must,翻译：布什
7、先生做什么事都很准时，他怎么会开幕式迟到呢？,二、情态动词表推测时的时态问题,以must为例1、推测现在的事,结构是：eg.He goes to school with a big bag everyday.He must be a student.2、推测正在进行的事：eg.The light is off now.He must be sleeping.3、推测过去的事：eg.Lihua took a lot of photos in London.He must have visited the city.,must do/be,must be doing,must have done/
8、been,说出下列结构的含义,must have donecant have donemay/might have donecan have done,肯定做过某事,不可能做过某事,也许做过某事（肯定句）,也许做过某事(疑问句）,解决情态动词表推测的题目思路是：,1、判断句式，2、看推测的把握有多大,3、看推测的事情什么时候发生。,小综合练习,1.I think Helen is at home.No,she _ be,for she phoned me from the airport just five minutes ago.A.mustntB.needntC.cant D.ought
9、not2.-Good morning.I got an appointment with Miss Smith yesterday.-Ah,you _ be Mr.Peter.A.might B.must C.would D.can,3.What do you mean,there are only ten tickets?There _ be twelve.A.should B.would C.will D.shall4.He is a good sportsman so he _ win the match even he is injured.A.canB.mightC.succeede
10、d to D.was able to5.Although this task _ sound easy,great care is needed.A.must B.may C.shall D.should,6-When can I come for the photos?I need them tomorrow afternoon.-They _be ready by 12:00.A.can B.should C.might D.need,7.There is no light in the room._ he be sleeping?A.Must B.ShallC.Can D.Will 8.
11、Hurry up,he _ for you at the school gate now.A.may be waitingB.may have waitedC.must be waitingD.might wait,9.This cake is very sweet.You _ a lot of sugar in it.A.should put B.could have put C.might put D.must have put 10.I left my handbag on the train,but luckily someone gave it to a railway offici
12、al.How unbelievable to get it back!I mean,someone _ it.A.may steal B.might have stolen C.must steal D.must have stolen,11.-She looks very happy.She _ have passed the exam.-I guess so.Its not difficult after all.A.should B.could C.must D.might12.She _ have left school,for her bike is still here.A.can
13、t B.wouldnt C.shouldnt D.neednt,must have donecant have donemay/might have donecan have doneshould(ought to)have doneshouldnt(oughtnt to havedonecould have doneneed have doneneednt have done,二、“情态动词+完成式”,表对过去的猜测,表虚拟,1.“should（ought to）+完成式”表示_。“shouldnt（oughtnt to）+完成式”表示某种行为_。,本应该做某事而实际上没有做,不该发生但却发
14、生了,Oh,Im not feeling well in the stomach,I _ so much fried chicken just now.A.shouldnt eat B.mustnt have eaten C.shouldnt have eaten D.mustnt eatIll tell Mary about her new job tomorrow.You_ her last week.A.ought to tell B.would have told C.must tell D.should have told,2.“could+have done”表示_但结果没能做成，
15、含有遗憾的意味。,本来能够做成某事,We could have faced the difficulty together,but why didnt you tell me?,注意：can have done表示过去可能做过某事 Where can Mary have put the empty bottles?,You neednt have walked up;you _ the lift.A.could have taken B.could take C.can have taken D.can take,3.“neednt+不定式的完成式”表示_而实际上做了某事。The weathe
16、r turned out to be fine yesterday.I _ the trouble to carry my umbrella with me.A.should have taken B.could have taken C.neednt have taken D.mustnt have taken,本来不必做某事,1.She _ the book sometime in the past,or she couldnt have answered the question so well.A.can haveB.must have readC.should readD.need
17、reading2.Tom went on foot,but he _ by bus.A.might be goingB.should goC.could have goneD.ought have gone,小综合练习,3.Mary _ the hospital so soon,for she had not got recovered.A.has left B.didnt leaveC.must have left D.shouldnt have left4.There was plenty of time,so she _.A.mustnt have hurriedB.neednt hur
18、ryC.mustnt hurry D.neednt have hurried,5.You _ the exam,but you spent all your time playing.A.can pass B.could have passedC.could pass D.can have passed6.My MP4 isnt in my bag.Where_I have put it？A.can B.must C.should D.would,7.You _ him at the meeting yesterday.He has gone to America.A.cant see B.c
19、ant have seenC.mustnt have seen D.neednt have seen8.Im told that John had another car accident this morning.I believe not.He _ so careless.A.shouldnt have been B.wouldnt have been C.couldnt have been D.mustnt have been,新闻回放：北京时间3月8日2点40分MH370航班与塔台失去联系。该航班于凌晨0点41分从吉隆坡起飞，原定于早上6点30分在北京降落。机上共有227名乘客，包括2
20、名儿童，以及12名机组人员。,Writing指出刚才的谈话中那句话可以用所学结构翻译？,马航MH370失踪了那么久，机上人员很有可能已经死了，也有可能还活着。失踪后一周里，由于马来西亚没有如实告知马航最后飞行行踪的信息，致使多国在泰国湾的搜救工作徒劳无功。这么多的人力物力和时间原本可以不耗费。生命高于一切，239条生命，两百多个家庭的破碎，马来西亚实在太不应该隐瞒相关信息。一名中国籍的飞机工程师乘客起初被怀疑涉恐子，但经过调查，这名乘客不可能劫持飞机。一个名叫唐驳虎的凤凰新闻评论员推测，飞机肯定落在圣诞岛上。但目前为止，飞机还是找不到，所幸情况有明朗趋势。,马航MH370失踪了那么久，机上人员
21、很有可能已经死了，也有可能还活着。失踪后一周里，由于马来西亚没有如实告知马航最后飞行行踪的信息，致使多国在泰国湾的搜救工作徒劳无功。这么多的人力物力和时间原本可以不耗费。生命高于一切，239条生命，两百多个家庭的破碎，马来西亚实在太不应该隐瞒相关信息。一名中国籍的飞机工程师乘客起初被怀疑涉恐，但经过调查，这名乘客不可能劫持（hijack）飞机。一个名叫唐驳虎的凤凰新闻评论员推测，飞机肯定落在圣诞岛上。但目前为止，飞机还是找不到，所幸情况有明朗趋势。tips:Malaysia,the manpower,material resources and financial resources,keep
22、 the truth,hijack,Christmas Island,三 情态动词的特定语气,1._ you interrupt now?Cant you see Im on the phone.A.Can B.Should C.Must D.Would,must 偏偏，偏要,2.One of our rules is that every student _ wear school uniform while at school.A.might B.could C.shall D.will,shall 用于第三人称,在条约、规定、法令等中表命令或规定,3.I havent got the r
23、eference book yet,but Ill have a test on the subject next month.-Dont worry.You _ have it by Friday.A.could B.shall C.must D.may,shall 用于第二/三人称表允诺，命令，威胁等语气,4.I cant believe my eyes.Such well-educatedgentleman _ behave like this!A.would B.should C.can D.must,should“竟然，居然“，表愤怒惊讶的语气,1.will 可用各人称作主语,表示“
24、意志”“意愿”“决心”等.I will never do that again.2.will 有时表示一种习惯动作或状态或自然规律.“惯于,总是(会),终归是”Boys will be boys.男孩终归是男孩。Matches will not strike if they are damp.火柴潮湿就擦不着。,1.will 和would 的用法,补充,The door _ open.这门经常打不开。,wont,would 可用于各人称,表示过去时间的“意志”“愿望”和 决心”.,2.would 还可以表示过去习惯发生的动作.,He used to take a walk near the f
25、orest in the evening.,（现在可能散步也可能不散步了）,used to表示过去常常发生的动作或存在的习惯，但现在已不复存在了。,He would take a walk near the forest in the evening.,（而现在不散步了）,would,used to区别,When I lived with my roommates in the university,we _ often talk into the night.Amight Bmust Cshould Dwould,三 情态动词的特定语气,2._ better do(not do)3._ ra
26、ther dothan do4._ not too/enough5.can but do _,You cant be too careful when you are driving.You cant remember enough English words.,had,would,can,只好,I can but agree with you.,三 情态动词的特定语气,6.cant help but do sth.cant but do sth.cant choose but doI cant but admire your courage.,不得不、不能不,cant help but ad
27、mire,cant choose but admire,三 情态动词的特定语气,7.may/might as well(倒不如、只好)You might as well do your present job before you find a new one.8.may well do sth.(很可能)He may well say so/do that.9._ you succeed!(祝愿语）_all your dreams come true!10.should（应该，表责任，义务）You should study hard as a student.,May,May,1.May I
28、 smoke here?If you _,choose a seat in the smoking section.A.should B.could C.may D.must2.In those days,whenever I had difficulties,I _ Mr.Wang for help.A.used to go toB.was used to go toC.would go toD.used to going to3.I think Ill give Bob a ring.You _.You havent been in touch with him for ages.A.wi
29、ll B.may C.have to D.should,情态动词的做题技巧:,1.充分利用句子语境。综观历年高考英语情态动词的考查情况，有相当一部分考题从本质上看都是在考查情态动词在具体语境中的运用，即只要考生能弄清各个被考查情态动词的意思，就可作出正确选择。如：,Lucy doesnt mind lending you her dictionary.She _.Ive already borrowed one.A.cant B.mustnt C.neednt D.shouldnt 分析：答案选C。既然“我已经借了一本”，据此语境所以“她就没有必要借给我了”。,(1)Helen _ go on
30、 the trip with us,but she isnt quite sure yet.A.shall B.must C.may D.can(2)Ive taken someone elses green sweater by mistake.It _ Harrys.He always wears green.A.has to be B.will be C.mustnt be D.could be,2.根据时间确定时态。即要分清情态动词表推测时涉及的是现在情况还是过去情况。原则上说，若对现在情况进行推测，情态动词后接动词原形或进行式；若对过去情况进行推测，则后接动词的完成式；,This c
31、ake is very sweet.You _ a lot of sugar in it.A.should put B.could have put C.might put D.must have put分析：答案选D。前文说“蛋糕很甜”，下文“你一定是在里面放了很多糖”，故用“must have done”表示对过去情况的肯定推测。,对现在或将来的推测常用结构为：情态动词+_/_对过去情况的推测常用结构为：情态动词+_ 如：,do,be doing,have done,(1)Catherine,I have cleaned the room for you.Thanks.You _it.I
32、could manage it myself.A.neednt do B.neednt have done C.mustnt do D.mustnt have done(2)Mary stayed in Africa studying wild animals for 13 years before she returned.Oh,dear!She _ through a lot of difficulties!A.may go B.might go C.should have gone D.must have gone,Lets practise!,高考考题:1.I thought you
33、_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 been,B,D,B,4.-There were already fiv
34、e 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.A computer _ think for itself;it must be told what to do.A.cant B.couldnt C.may not D.might not,D,A,6.The fire spread through the hotel very quickly but
35、 everyone _ get out.A.had to B.would C.could D.was able to7.They will _ run this machine on theirown in three months.A.can B.could C.may D.be able to8.That big cinema _ seat 2,000 people.A.can B.should C.ought to D.is able to,D,D,A,8.Could I borrow your dictionary?Yes,of course you _.A.might B.will
36、C.can D.should9.You _ return the book now.You can keep it till next week if you like.A.cant B.mustnt C.neednt D.may not,C,C,10.Johnny,you _ play with the knife,you _ hurt yourself.A.wont;cant B.mustnt;may C.shouldnt;must D.cant;shouldnt,B,11.-Will you stay for lunch?-Sorry,_.My brother is coming to
37、see me.A.I mustnt B.I cant C.I neednt D.I wont12.-May I pick a flower in the garden?-_.A.No,you neednt B.Not,please.C.No,you mustnt D.No,you wont,B,C,13.Put on more clothes.You be feeling cold with only a shirt on.A.can B.could C.must D.would14.Must I drive to his house and pick up the children?No,.
38、A.you shouldntB.you might not C.you neednt D.you mustnt,C,C,15.We didnt see Tom at the meeting yesterday.He it.A.mustnt have attended B.cannot have attended C.neednt have attended D.would have not attended16.We play chess than bridge.Some of us dont know how to play bridge.A.had betterB.would better C.would rather D.had rather,B,A,
