高中英语《Unit 2 Healthy eating》period 2课件 新人教版必修3.ppt

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1、HealthyEatingperiod2LearningaboutLanguageWarmingUpPreparefor“discoveringusefulwordsandexpressions”onpage12.Ex1.lie2.getawaywith3.raw4.curiosity5.customer6.benefitEx2.2.oughtto4.diet5.raw8.balanced9.energetic10.slimbecomethinner—loseweight3.beinglaughedatby

2、herfriends—losingface6.feltsosadandhopelessaboutherself—loseheart7.wasunwillingtovisitanymore—loseinterestinvisitingPreparefor“Discoveringusefulstructures”onpage13.Ex2.oughtto;shouldn’t;needn’t;don’thaveto/needn’t;will2.haveto;mustn’t3.oughtto;shouldPresen

3、tationGrammar__________主要情态动词Can,couldMay,mightMustOughttoNeedDare,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

4、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：Youm

5、usthandinyourhomeworkthisFriday.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

6、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

7、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,________?won’tyouB.oughtnotyouC.shouldn’tyouD.wouldn’tyou他们想必已到那儿了。Theyoughttobether

8、ebynow.(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.