Unit2HealthyLifestyleDiscoverusefulstructures課件高二英語(yǔ)人教版選擇性

DiscoveringusefulstructuresTheinfinitiveoftheverbusedasthesubjectOliviaUnit2HealthyLifestyleInthisclass,youwill1.

identifythefunctionsandmeaningsoftheto-infinitivesusedassubjects;2.usetheto-infinitiveassubjectsproperly

inrealcontexts.1.能在健康生活方式的主題語(yǔ)境中，識(shí)別和理解不定式作主語(yǔ)的功能和意義；2.運(yùn)用動(dòng)詞不定式和與健康生活方式相關(guān)的主題詞匯進(jìn)行表達(dá)。LearningObjectives1.Tochangebadhabitsisnevereasy.2.Ittookthesurgeonthreehourstofinishmymother’slungsurgery.3.TojointhePeople’sLiberation(n.解放)Army,itisrequiredformentoshaveofftheirbeards.4.Itwasnotpolitetodisturbyourneighbourswithloudmusiclastnight.Activity1:Lookatthefollowingsentencesandpayattentiontotheitalicisedinfinitives.Inpairs,discusstheirmeaningsandfunctions.主語(yǔ)subject形式主語(yǔ)

formalsubjectTip1：將形式主語(yǔ)______置于句首，____________置于句末，可以避免句子頭重腳輕、結(jié)構(gòu)失衡。it動(dòng)詞不定式四個(gè)句子中的不定式都充當(dāng)主語(yǔ)。用形式主語(yǔ)it代替真正的主語(yǔ)tochangebadhabits符合英語(yǔ)表達(dá)習(xí)慣，避免句子頭重腳輕、結(jié)構(gòu)失衡。如果作者有意將比較長(zhǎng)的不定式主語(yǔ)放在句首，那么作者就是想要突出不定式的內(nèi)容。1.It

isnevereasytochangebadhabits.2.Ittookthesurgeonthreehourstofinishmymother’slungsurgery.3.Tojoin

thePeople’sLiberationArmy,itis

requiredformentoshaveoff

theirbeards.4.It

wasnotpolite

todisturb

yourneighbourswithloudmusiclastnight.1.Ittakessb.+sometime+todo2.

It+be+adj.+for/ofsb.+todoreadthesentencesagainandworkoutthestructure◎It+be+adj.+for/ofsb.+todoItis＋adj.

＋forsb.todosth.常用于表示事物的特征，用于此句型的形容詞有：easy,hard,difficult,possible,important,impossible,necessary,good,bad,exciting,interesting,surprising等。Itis＋adj.＋ofsb.＋todosth.表語(yǔ)常為表示人的性格、品質(zhì)的形容詞，句中用of。如good,kind,nice,foolish,polite,ever,careless等。1.However,duringthisperiod,itcanbeeasyforsomeofthemtoformbadhabits.2.Topreventharmfulhabitslikethesefromdominatingateenager’slife

isessential.3.Tochangebadhabitsisnevereasy,evenwithmanyattempts.4.Afterall,itisnoteasytobreakbadhabits.Activity2:Find

moreinfinitivesassubjectsinthereadingpassage.Thendiscusstheirmeaningsandfunctionsingroups.Activity2:Jointhewordstomakefullsentences,andthenjointhe

sentencestomakeaparagraph.Youcanaddyourown

sentencesifnecessarytomakeyourparagraphmore

meaningful.Example:1.important/avoid

/passivecigarettesmoking

Itisimportanttoavoidpassivecigarettesmoking.Ittakessb.+sometime+todoIt+be+adj.+for/ofsb.+todo2.willtake/nutritionspecialist/abalanceddietmenu/make/anhour/

foryou_____________________________________________________________3.useful/turnto/fitnessconsultant/foradvice_____________________________________________________________4.illegal/dangerous/take/drugs_____________________________________________________________5.harmful/skipbreakfast/often_____________________________________________________________Itwilltakenutritionspecialistanhourtomakeabalanceddietmenuforyou.Itisusefultoturntofitnessconsultantforadvice.Itisillegalanddangeroustotakedrugs.Itisharmfultooftenskipbreakfast.Activity3:Completetheconversationswiththecorrectformsofthephrasesinthebox.1A:Hello,doctor.Iwanttoloseweight,butIjustcan’tseemtodoit.WhatcanyoudotohelpmeB:Well,first,it’snecessaryto_____________whatyoueat.Cutoutallfattyfoodandsugarydrinks,andeatmorefruitandvegetables.2A:Ireallyneedto_________awaytoexercisemore.Icoulduseafitnessapp,butmyphone’sfull.B:Sodeleteafewfiles.I'msuretheappdoesn'ttakeupmuchspace.beincontrolofdecideonbeginwith beincontrolof makeachoicedecideon makeupone’smind3A:Beforeexercising,alwaysdoafewwarm-upsto__________.B:Iknow.ButthenIalwaysfeeltootiredtocontinue!4A:ShouldIgoforthepizzaorthefriedchickenIhate______________likethese.Youknowwhat—I'mgoingtoeatboth!B:Wow!Don’teattoomuchjunkfood—you’llgetfat.I’veactually________________togoonadiet,soI’lljuststicktothefruitsal