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1、Healthy EatingLearningabout LanguageWarming UpPrepare for “discovering useful words and expressions” on page 12.Ex 1.1.lie 2. get away with 3. raw4. curiosity 5. customer 6. benefitEx 2.2. ought to 4. diet 5. raw 8.balanced9. energetic 10. slim1.become thinnerlose weight3. being laughed at by her fr
2、iendslosing face6. felt so sad and hopeless about herselflose heart7. was unwilling to visit any morelose interest in visitingPrepare for “Discovering useful structures” on page 13.Ex 2.1.ought to; shouldnt; neednt; dont have to/neednt; will2. have to; mustnt3. ought to; shouldPresentation主要情态动词主要情态
3、动词Can, couldMay, mightMustOught toNeedDare, daredcan表能力：表能力：I can read very fast.表客观可能性：表客观可能性：Mary cant be the leader.表允许：表允许：You can take it away.表怀疑：表怀疑：How can you finish it?could表能力表能力/可能性：可能性：Could you finish it soon?表怀疑：表怀疑：He could not be 50.委婉地提出问题：委婉地提出问题：Could you show me the passport?用于虚
4、拟：用于虚拟：If you had come, you could have got a wonderful gift.may询问或说明可不可以做：询问或说明可不可以做：May I ask you a question?表可能会发生：表可能会发生：He may get angry.表目的或让步的从句：表目的或让步的从句：Come here in time so that you may see the singer.might表可能的事：（表可能的事：（同同may）表目的从句：表目的从句： （同同may）用于虚拟：用于虚拟： If you had finished it, the boss m
5、ight have given you some promotion. must表必须做的事：表必须做的事：You must hand in your homework this Friday.表揣测：表揣测：It must have rained last night.表表“偏偏偏偏”的意思：的意思：He must get a fever when we were ready to get off.ought to 表应该做的事：表应该做的事：You ought to do it carefully.表非常可能的事：表非常可能的事：He ought to be here by now.nee
6、d表需要；主要用于否定句或疑问句：表需要；主要用于否定句或疑问句：We neednt hurry.可用于否定意思的句子：可用于否定意思的句子：I dont think you need do it.作及物动词，和不定式连用：作及物动词，和不定式连用：He didnt need to say that to her.dare表表“敢于敢于”，主要用于疑问句、否定句和，主要用于疑问句、否定句和条件从句：条件从句：He dare not tell him the news.作及物动词，与不定式连用：作及物动词，与不定式连用：We dont dare to enter the house.shall用
7、于第一，三人称疑问句，用于第一，三人称疑问句，征求意见或请求征求意见或请求shall第二，三人称陈述句第二，三人称陈述句,命令命令,警告警告,允诺允诺,威胁威胁should表劝告，建议，命令，顺理成章表劝告，建议，命令，顺理成章oughtto表应该，语气表应该，语气should美语中，美语中，oughtto用于否，疑句时用于否，疑句时to可省。可省。多数情况下，多数情况下，oughtto可与可与should互换使用。互换使用。疑问句中常用疑问句中常用should代替代替oughtto。Oughtto的反意疑问句用的反意疑问句用shouldnt替代。替代。Oughtto表示表示“想必会想必会”时
8、语气较时语气较must弱。弱。shall,should&oughtto你最好不要抽烟了。你最好不要抽烟了。 You should/ ought to stop smoking.YououghttohavehelpedhimwithhisEnglish,_?A.wontyouB.oughtnotyouC.shouldntyouD.wouldntyou他们想必已到那儿了。他们想必已到那儿了。They ought to be there by now.(语气较语气较must 弱弱)比较比较had better, should & ought to 三者均表示建议，意为三者均表示建议，意为“应该应该”
9、，“应当应当”或或“最好最好做做”.三者的语气程度为渐强。三者的语气程度为渐强。hadbetter指一般性的建议，最弱。指一般性的建议，最弱。should&oughtto含义相近，常可互换。区别在于，含义相近，常可互换。区别在于，oughtto常指特殊情况下的常指特殊情况下的“应当应当”。Should则指一般则指一般情况。见例句。情况。见例句。Yououghttohelphimbecauseheisintroublenow.(语气强，有命令意味。语气强，有命令意味。)Youshouldhavearestafterfinishingyoursports.（一般性建议）（一般性建议）have to
10、 haveto表示表示客观需要客观需要去做的事情，意为去做的事情，意为“必必须，不得不。须，不得不。”Ihavetogetthestationearlytocatchthefirsttrain.Wemissedthebussowehadtowalkhome.Wehavetoovercomeallkindsofdifficulties.Haveto有多种时态。常见的有：有多种时态。常见的有：一般将来时一般将来时Wewillhavetogatherattheschoolgateat7tomorrow.一般现在时一般现在时Ihavetotakemoremoneywithmebecausemygirl
11、friendhassomuchtobuy.一般过去时一般过去时Finally,wehadtogiveupourideatoholdapicnicoutsideasitrainedforawholeafternoon. have to （考点）（考点）Musttheydo?Yes,theymust.No,theyneednt/donthaveto.must&havetomust have to主观客观主观客观 主观主观 客观客观时态时态 现在，将来现在，将来 多种多种表推测表推测询问意愿询问意愿否定意否定意禁止，不允许禁止，不允许 不必不必 must表主观意志，而表主观意志，而haveto表由于
12、客观因素表由于客观因素不得不做完成的事情。不得不做完成的事情。Must没有过去式，除在间接引语中可表示过没有过去式，除在间接引语中可表示过去的时间。在直接引语中表示过去的时间用去的时间。在直接引语中表示过去的时间用hadto代替。代替。Itoldherthatshemustgiveupsmoking.Shesaid,“Wehadtogeteverythingreadythatnight.”比较比较must&havetoNeedIdo?Yes,youmust.No,youneednt.dare&need情态动词情态动词实义动词实义动词dare否，疑，条否，疑，条darenotdo否否,疑疑don
13、tdaretododontdaredo不用于肯定句不用于肯定句肯：肯：daretodoneed否，疑否，疑needntdo(dont)needsth(dont)needtodo肯：肯：must,haveto,oughtto,should注意对注意对need问句的回答问句的回答:-NeedIfinishtheworktoday?-Yes,_.No,_.No,_.youmustyouneedntyoudonthavetoneednt对其它情态动词的回答对其它情态动词的回答:-ShallItellJohnaboutit?-No,you_.-No,you_.-Mustwedoitnow?-No,you
14、_.-No,you_.needntdont have toneedntdont have toExercises高考链接高考链接1.-IsJohncomingbytrain?-Heshould,buthe_not.Helikesdrivinghiscar.(高考真题）高考真题）A.mustB.canC.needD.may2.Ithasbeenannouncedthatcandidates(候选人候选人)_remainintheirseatsuntilallthepapershavebeencollected.(高考真题）高考真题）A.canB.willC.mayD.shall3.-Iheard
15、theywentskiinginthemountainslastwinter.(高考真题）高考真题）-It_truebecausetherewaslittlesnowthere.A.maynotbeB.wontbeC.couldntbeD.mustntbePractice1:高考考题专练高考考题专练1.Ithoughtyou_likesomethingtoread,soIhavebroughtyousomebooks.A.mayB.mightC.wouldD.must2.Whereismypen?I_it.A.mightloseB.wouldhavelostC.shouldhavelostD.
16、musthavelost3.Ididnthearthephone.I_asleepA.mustbeB.musthavebeenC.shouldbeD.shouldhavebeenBDB4.-Therewerealreadyfivepeopleinthecar,buttheymanagedtotakemeaswell.-It_acomfortablejourneyA.cantbeB.shouldntbeC.mustnthavebeenD.couldnthavebeen5.Itsnearlysevenoclock.Jack_behereatanymoment.A.mustB.needC.shoul
17、dD.couldDC6.-Didthetrainarriveintime?-No.It_twohoursago.A.musthavearrivedB.oughttohavearrivedC.mustarriveD.oughttoarrive7.MustIdrivetohishouseandpickupthechildren?No,. A.youshouldnt B.youmightnot C.youneednt D.youmustntBC8.WedidntseeTomatthemeetingyesterday.Heit. A.mustnthaveattended B.cannothaveatt
18、ended C.neednthaveattended D.wouldhavenotattendedB9.Thereissomeoneknockingatthedoor.itbeTom? A.can B.mustC.shouldD.oughttoA10.Twoyearsago,myhusbandboughtmeabicycle.Ifyouliveintown,itisoftenfasterthanacarandyouworryaboutparking.A.mustnotB.maynotC.shouldnotD.donthavetoD11.You_suchalongcomposition.Theteacheronlyaskedfor300words.Youhavewritten600.A.mustnthavewrittenB.couldnthavewrittenC.neednthavewrittenD.donothavetowriteCConclusionWrite a different ending to the story Come And Eat Here (1)
