高中英語(yǔ)語(yǔ)法精講之情態(tài)動(dòng)詞3PPT課件

1、情態(tài)動(dòng)詞練習(xí)情態(tài)動(dòng)詞情態(tài)動(dòng)詞can/couldcan/couldwill/ wouldwill/ wouldmay/mightmay/mightmustmustshallshallshouldshouldneedneedought to/have toought to/have todaredare基本用法基本用法1. 情動(dòng)情動(dòng)+動(dòng)詞原形動(dòng)詞原形had betterhad better2. 沒(méi)有人稱(chēng)和數(shù)的變沒(méi)有人稱(chēng)和數(shù)的變化化( 除除“have to”外外). 3. 否定式否定式: +notought not to can could1.表表“能力能力”（體力（體力,腦力腦力或技術(shù)或技術(shù))ca

2、n you lift this heavy box?i couldnt understand what he said at all.2.表表“許可許可”“建議建議,請(qǐng)求請(qǐng)求”you can use a different material instead.could you help me carry the box ?3.表表“推測(cè)推測(cè)” “可能可能性性”no, no, it cant be true. what on earth can this mean?can與與could用法對(duì)用法對(duì)比比 we thought the story couldnt be true. / how cou

3、ld you be so careless?4.cantcouldnt+have+p.p表示對(duì)過(guò)去的否定推測(cè)表示對(duì)過(guò)去的否定推測(cè)他不可能去過(guò)那個(gè)小鎮(zhèn)。他不可能去過(guò)那個(gè)小鎮(zhèn)。he couldnt have been to that town.她不可能做這樣愚蠢的事她不可能做這樣愚蠢的事.she cant have done such a foolish thing. he could have finished the task on time, but the heavy snow came.5.could+have+p.p: 表示本來(lái)能做得到表示本來(lái)能做得到, 但事實(shí)上未做到但事實(shí)上未做到.

4、6.can+have+done：一般用在疑問(wèn)句中表推測(cè)：一般用在疑問(wèn)句中表推測(cè)1.you dont have to know the name of the author to find a book. you_find the book by the title.(08湖南）湖南）must b.need c.can d.would2.peter_be really difficult at times even though hes a nice person in general.(08遼寧）遼寧）a.shall b.should c.can d.must3.if it were not

5、for the fact that she_sing, iwould invite her to the party.a.couldnt b.shouldnt c.cant d.might not1.-i cant find my purse anywhere(08重慶）重慶） -you _ have lost it while shopping.a.may b.can c.should d.would3.liza_well not want to go on the trip-she hates traveling.(08全國(guó)卷全國(guó)卷ii）a.will b.can c.must d.may1

6、.the teacher_have thought johnson was worth it or she wouldnt have wasted time on him,i suppose.(07安徽）安徽）a.should b.can c.would d.must2.in crowded places like airports and railway stations,you_take care of your luggage.(07北京）北京）a.can b.may c.must d.willmust與 have to用法對(duì)比must have to1.表表必必須須(主觀看法主觀看法)

7、必須必須; 沒(méi)沒(méi)有過(guò)去式有過(guò)去式,可用于間接可用于間接引語(yǔ)中引語(yǔ)中. he told me i must do according to what he said.(客觀需要客觀需要)不得不不得不;有有多種時(shí)態(tài)多種時(shí)態(tài). -its raining heavily, we cant go now. -i think well have to wait till the rain stops.2.疑疑問(wèn)句問(wèn)句及答及答語(yǔ)中語(yǔ)中must i ? yes, you must.(一定一定) no, you neednt. no, you dont have to do you have to go tod

8、ay? yes, we do. 否定句否定句: you dont have to worry about that.you must be hungry now, _?= im sure you are hungry now.he must be watching tv now, _?= im sure he is watching tv now.tom must have lived here for a long time, _?= im sure tom has lived here for a long time.she must have arrived yesterday, _?=

9、 im sure she arrived yesterday.*陳述部分的must表示“一定”,“想必”等推測(cè)意義時(shí),要根據(jù)陳述部分的不定式結(jié)構(gòu), 在附加疑問(wèn)部分采用與其相適應(yīng)的主動(dòng)詞或助動(dòng)詞形式.arent youisnt hehasnt hedidnt she1.-may i smoke here -if you _,choose a seat in the smoking section.(06山東）山東）should b. could c. may d.must2.he_have completed his work; otherwise,he wouldnt be enjoying

10、himself by the seaside.a.should b.must c.wouldnt d.cant3.tom, you_leave all your clothes on the floor like this!(05河南）河南）a.a. wouldnt b.mustnt c.neednt d.may not1.-im sorry.i_at you the other day.(08江蘇）江蘇） -forget it.i was a bit out of control myself.a.shouldnt shout b.shouldnt have shoutedc. mustnt

11、 shout d.mustnt have shouted2.-what does the sign over there read -”no person_smoke or carry a lighted cigarette, cigar or pipe in this area.”(07四川）四川）a. will b.may c.shall d.mustshould與與shall用法對(duì)比用法對(duì)比should shall1.表表“應(yīng)應(yīng)當(dāng)當(dāng)”表示勸告,建議you should listen to the doctors advice.2.表表可能可能的猜的猜測(cè)測(cè)they should get h

12、ome by now.作情態(tài)動(dòng)詞作情態(tài)動(dòng)詞,用于第一、三人稱(chēng)用于第一、三人稱(chēng)表示征求對(duì)方意見(jiàn)或請(qǐng)求表示征求對(duì)方意見(jiàn)或請(qǐng)求shall we begin our lesson?shall he go out for a walk?用于第二、三人稱(chēng)，表示允諾、用于第二、三人稱(chēng)，表示允諾、警告、威脅、命令、決心等。警告、威脅、命令、決心等。you shall have a nice presentfor your birthday.(允諾允諾)1.it has been announced that candidates_remain in their seats until all the pape

13、rs have been collected.(02上海）上海）can b.will c.may d.shall2. -write to me when you get there. -_.(01北京）北京）i must b.i should c. i will d. i can3.-the room is so dirty._we clean it -of course.a.a.will b.shall c.would d.do1.-i dont mind telling you what i know. -you_, im not asking you for it.(04江蘇）江蘇）mu

14、stnt b.may not c.cant d.neednt2.i wonder how he_that to the teacher.（95上海）上海）a.dare to say b.dare saying c.not dare say d.dared say3. you dont_to go there if you have no time.(97 上海）上海）a.a. need b.want c.must d.oughtneed與與dare用法對(duì)比用法對(duì)比need dare1.情態(tài)動(dòng)詞+v *疑問(wèn)式 *否定式he need not (neednt) go.need we do it a

15、gain?no, you neednt do it again.dare she go out alone at night?how dare you say i am unfair?he dare not say so.2.need/dare+ to do *肯定式 *否定式 *疑問(wèn)式he needs to go.he doesnt need to go.does he need to do it again?he dares to say.he does not dare (to) say.if you dare to jump into the water from here, so d

16、are i.1.although this _sound like a simple task, great care is needed.(08四川）四川）a.must b.may c.shall d.should2.my english-chinese dictionary has disappeared.who_have taken ita.should b.must c.could d.would3.according to the air traffic rules,you_switch off your mobile phone before boarding.(08上海）上海）a

17、.may b.can c.would d.should4.you_be hungry already-you had lunch only two hour ago!(08浙江）浙江）a.woulnt b.cant c.mustnt d.neednt5.it is usually warm in my hometown in march, but it_be rather cold sometimes.(08福建）福建）a.must b.can c.should d.would6.-what sort of house do you want to have? something big?(0

18、8陜西）陜西） -well, it_be big-thats not important.mustnt b.neednt c.cant d.wont7.my mp4 player isnt in my bag, where_i haveput it(07福建）福建）a.can b.must c.should d.would8.this cake is very sweet. you_a lot of sugar in it.(05遼寧）遼寧）a.should put b.could have put c.might put d.must have put9.i told your friend how to get to the hotel, but perhaps i_have driven her there.(07陜西）陜西）a.could b.must c.mig