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《高一英语（下）必修三Unit 2 Learning about language.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、LearningaboutlanguageAnswerkeysforEx.1onPage11:VerbAdjectiveNounweakenstrengthenbeautifydigestivebalanceamazementstrongamazingweaknessbeautifulweakstrengthbeautybalancedigestdigestionbalancedamazeAnswerkeysforEx.2onPage12:AlternativewordsandexpressionsWord
2、sandexpressionsfromthetextshouldrunawayafter…somethingtomake…wishtoknow…getridofsomethingpartsofplants…changingfoodinto…properamountof…oughttogetawaywithslimmingfoodscuriositythrowawayfibredigestionbalanceddietAnswerkeysforEx.3onPage12:slim2.research3.weak
3、ensses4.cucumber5.mushrooms6.body-building7.rawModalVerb(2)Grammaroughttooughtto用于表示"想必会"(语气较must弱)：他们想必已到那儿了。Theyoughttobetherebynow.2.他最好不要抽烟了。Heoughttostopsmoking.多数情况下，oughtto可与should互换使用。Oughtto的反意疑问句用shouldn’t替代。13.YououghttohavehelpedhimwithhisEngli
4、sh,________you?A.won’tyouB.oughtnotyouC.shouldn’tyouD.wouldn’tyou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。见下页例句。Yououghttohelphimbecauseheisintroubleno
5、w.(语气强，有命令意味。)Youshouldhavearestafterfinishingyoursports.（一般性建议）Yououghttocallthepolicewhenyoufindsomethingwronginyourhouse.Heshouldtakecareofthebabiestonight.havetohaveto表示客观需要去做的事情，意为“必须，不得不。”Ihavetogetthestationearlytocatchthefirsttrain.Wemissedthebusso
6、wehadtowalkhome.Wehavetoovercomeallkindsofdifficulties.Haveto有多种时态。常见的有：一般将来时，Wewillhavetogatherattheschoolgateat7tomorrow.一般现在时Ihavetotakemoremoneywithmebecausemygfhassomuchtobuy.一般过去时Finally,wehadtogiveupourideatoholdapicnicoutsideasitrainedforawholeafte
7、rnoon.haveto（考点）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，顺理成章的＝oughtto疑问句中常用should代替oughttooughtto表应该，语气＞should美语中，oughtto用于否，疑句时to可省shall,should&oughttoNeedIdo…?Yes,youmust.No,youneedn’t.dare&need情态动词实义动词dare否，疑，条darenotdo否,疑don’t
8、daretododon’tdaredo不用于肯定句肯：daretodoneed否，疑needn’tdo(don’t)needsth(don’t)needtodo肯：must,haveto,oughtto,shouldMusttheydo…?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
