高中英语Unit2Healthyeatingperiod2课件新人教版必修3

HealthyEatingLearningaboutLanguageWarmingUpPreparefor“discoveringusefulwordsandexpressions”onpage12.•Ex1.1.lie2.getawaywith3.raw4.curiosity5.customer6.benefitEx2.2.oughtto4.diet5.raw8.balanced9.energetic10.slim1.becomethinner—loseweight3.beinglaughedatbyherfriends—losingface6.feltsosadandhopelessaboutherself—loseheart7.wasunwillingtovisitanymore—loseinterestinvisitingPreparefor“Discoveringusefulstructures”onpage13.Ex2.1.oughtto;shouldn’t;needn’t;don’thaveto/needn’t;will2.haveto;mustn’t3.oughtto;shouldPresentation主要情态动词•Can,could•May,might•Must•Oughtto•Need•Dare,daredcan•表能力：Icanreadveryfast.•表客观可能性：Marycan’tbetheleader.•表允许：Youcantakeitaway.•表怀疑：Howcanyoufinishit?could•表能力/可能性：Couldyoufinishitsoon?•表怀疑：Hecouldnotbe50.•委婉地提出问题：Couldyoushowmethepassport?•用于虚拟：Ifyouhadcome,youcouldhavegotawonderfulgift.may•询问或说明可不可以做：MayIaskyouaquestion?•表可能会发生：Hemaygetangry.•表目的或让步的从句：Comehereintimesothatyoumayseethesinger.might•表可能的事：（同may）•表目的从句：（同may）•用于虚拟：Ifyouhadfinishedit,thebossmighthavegivenyousomepromotion.must•表必须做的事：YoumusthandinyourhomeworkthisFriday.•表揣测：Itmusthaverainedlastnight.•表“偏偏”的意思：Hemustgetafeverwhenwewerereadytogetoff.oughtto•表应该做的事：Yououghttodoitcarefully.•表非常可能的事：Heoughttobeherebynow.need•表需要；主要用于否定句或疑问句：Weneedn’thurry.•可用于否定意思的句子：Idon’tthinkyouneeddoit.•作及物动词，和不定式连用：Hedidn’tneedtosaythattoher.dare•表“敢于”，主要用于疑问句、否定句和条件从句：Hedarenottellhimthenews.•作及物动词，与不定式连用：Wedon’tdaretoenterthehouse.shall用于第一，三人称疑问句，征求意见或请求shall第二，三人称陈述句,命令,警告,允诺,威胁should表劝告，建议，命令，顺理成章oughtto表应该，语气＞should•美语中，oughtto用于否，疑句时to可省。•多数情况下，oughtto可与should互换使用。•疑问句中常用should代替oughtto。•Oughtto的反意疑问句用shouldn’t替代。•Oughtto表示“想必会”时语气较must弱。shall,should&oughtto你最好不要抽烟了。Youshould/oughttostopsmoking.YououghttohavehelpedhimwithhisEnglish,________?A.won’tyouB.oughtnotyouC.shouldn’tyouD.wouldn’tyou他们想必已到那儿了。Theyoughttobetherebynow.(语气较must弱)比较hadbetter,should&oughtto•三者均表示建议，意为“应该”，“应当”或“最好做…”.•三者的语气程度为渐强。•hadbetter指一般性的建议，最弱。•should&oughtto含义相近，常可互换。区别在于，oughtto常指特殊情况下的“应当”。Should则指一般情况。见例句。•Yououghttohelphimbecauseheisintroublenow.(语气强，有命令意味。)•Youshouldhavearestafterfinishingyoursports.（一般性建议）haveto•haveto表示客观需要去做的事情，意为“必须，不得不。”•Ihavetogetthestationearlytocatchthefirsttrain.•Wemissedthebussowehadtowalkhome.•Wehavetoovercomeallkindsofdifficulties.•Haveto有多种时态。常见的有：•一般将来时•Wewillhavetogatherattheschoolgateat7tomorrow.•一般现在时•Ihavetotakemoremoneywithmebecausemygirlfriendhassomuchtobuy.•一般过去时•Finally,wehadtogiveupourideatoholdapicnicoutsideasitrainedforawholeafternoon.haveto（考点）•Musttheydo…?Yes,theymust.No,theyneedn’t/don’thaveto.must&havetomusthaveto主观／客观主观客观时态现在，将来多种表推测√×询问意愿√×否定意禁止，不允许不必•must表主观意志，而haveto表由于客观因素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去的时间。在直接引语中表示过去的时间用hadto代替。•Itoldherthatshemustgiveupsmoking.•Shesaid,“Wehadtogeteverythingreadythatnight.”比较must&havetoNeedIdo…?Yes,youmust.No,youneedn’t.dare&need情态动词实义动词dare否，疑，条darenotdo否,疑don’tdaretododon’tdaredo不用于肯定句肯：daretodoneed否，疑needn’tdo(don’t)needsth(don’t)needtodo肯：must,haveto,oughtto,should注意对need问句的回答:--NeedIfinishtheworktoday?--Yes,________________.No,________________.No,________________.youmustyouneedn’tyoudon’thavetoneedn’t对其它情态动词的回答:--ShallItellJohnaboutit?--No,you__________.--No,you__________.--Mustwedoitnow?--No,you__________.--No,you__________.needn’tdon’thavetoneedn’tdon’thavetoExercises高考链接1.--IsJohncomingbytrain?--Heshould,buthe____not.Helikesdrivinghiscar.(高考真题）A.mustB.canC.needD.may2.Ithasbeenannouncedthatcandidates(候选人)____remainintheirseatsuntilallthepapershavebeencollected.(高考真题）A.canB.willC.mayD.shall3.--Iheardtheywentskiinginthemountainslastwinter.(高考真题）--It____truebecausetherewaslittlesnowthere.A.maynotbeB.won’tbeC.couldn’tbeD.mustn’tbePractice1:高考考题专练1.Ithoughtyou_____likesomethingtoread,soIhavebroughtyousomebooks.A.mayB.mightC.wouldD.must2.Whereismypen?I____it.A.mightloseB.wouldhavelostC.shouldhavelostD.musthavelost3.Ididn’thearthephone.I___asleepA.mustbeB.musthavebeenC.shouldbeD.shouldhavebeenBDB4.---Therewerealreadyfivepeopleinthecar,buttheymanagedtotakemeaswell.----It____acomfortablejourneyA.can’tbeB.shouldn’tbeC.mustn’thavebeenD.couldn’thavebeen5.It’snearlyseveno’clock.Jack___behereatanymoment.A.mustB.needC.shouldD.couldDC6.---Didthetrainarriveintime?----No.It_______twohoursago.A.musthavearrivedB.oughttohavearrivedC.mustarriveD.oughttoarrive7.MustIdrivetohishouseandpickupthechildren?No,.A.youshouldn'tB.youmightnotC.youneedn'tD.youmustn'tBC8.Wedidn'tseeTomatthemeetingyesterday.Heit.A.mustn'thaveattendedB.cannothaveattendedC.needn'thaveattendedD.wouldhavenotattendedB9.Thereissomeoneknockingatthedoor.itbeTom?A.canB.mustC.shouldD.oughttoA10.Twoyearsago,myhusbandboughtmeabicycle.Ifyouliveintown,itisoftenfasterthanacarandyouworryaboutparking.A.mustnotB.maynotC.shouldnotD.don'thavetoD11.You_____suchalongcomposition.Theteacheronlyaskedfor300words.Youhavewritten600.A.mustn’thavewrittenB.couldn’thavewrittenC.needn’thavewrittenD.donothavetowriteCConclusion•WriteadifferentendingtothestoryComeAndEatHere(1)