Unit2HealthyLifestyleDiscoverUsefulStructures公開課導(dǎo)學(xué)案-高中英語(yǔ)人教版選擇性

2019新人教高中英語(yǔ)選擇性必修三Unit2HealthyLifestyleDiscoverUsefulStructures導(dǎo)學(xué)案Teachingaims:1.Enablestudentstomastertheusageoftheinfinitiveasthesubject.2.Guidestudentstousetherelevantgrammarflexiblyandauthenticallyinrealsituations.Teachingkeypoints:Helpstudentsidentifytheusageoftheinfinitiveasthesubject.Guidestudentstousetheinfinitiveasthesubjecttoexpresstheirownideas.Designspecificsituationsforstudentstomakeuseoftheinfinitiveasthesubject.Teachingdifficultpoints:Howtousetheinfinitiveasthesubjectinrealsituations.Teachingprocedures:StepⅠLeadinKiller1.Tochoosemeistochooseillnesses.It'smyjobtoruinyourlungs!Ifyouareusedtome,itishardforyoutolivewithoutme.smokingKiller2.Myjobistomeetpeople'stasteneeds.Butmywishisnottomakepeoplefit.Ifyoutakemeasyourtreat,it'sreallyhardtoquit!junkfoodkiller3.Youneedtolookatyourselvestofindme.Youtrytogetmuchfromme,butonlytogettirednessandemptiness.stayinguplateYouneedtolookatyourselvestofindme.AdverbialMyjobistomeetpeople'stasteneeds.PredictiveTochoosemeistochooseillnesses.It'smyjobtoruinyourlungs!Ifyouareusedtome,itishardforyoutolivewithoutme.SubjectStepⅡPresentationActivity1Lookatthefollowingsentencesandpayattentiontotheitalicizedinfinitives,andtelltheirmeaningsandfunctions.1.Tochangebadhabitsisnevereasy.2.Ittookthesurgeonthreehourstofinishmymother’slungsurgery.3.TojointhePeople’sLiberationArmy,itisrequiredformentoshaveofftheirbeards.4.Itwasnotpolitetodisturbyourneighbourswithloudmusiclastnight.5.Howtogotherehasnotbeendecidedyet.Summary11.動(dòng)詞不定式的位置：在位于動(dòng)詞之_______.2.單個(gè)的動(dòng)名詞做主語(yǔ)，位于動(dòng)詞用______數(shù)。多個(gè)動(dòng)名詞做主語(yǔ)，謂語(yǔ)動(dòng)詞用_______數(shù)。3.疑問(wèn)詞+不定式結(jié)構(gòu)：與疑問(wèn)詞who,whom,whose,what,which,when,where,how等連用4.動(dòng)詞不定式在句中作主語(yǔ),有時(shí)為了保持句子的平衡,避免頭重腳輕,常用it作形式主語(yǔ),而真正的主語(yǔ)放在句子的末尾。比如第2、3、4例句。Activity2Findmoreinfinitivesinthereadingpassage.Suggestedanswers:1.Topreventharmfulhabitslikethesefromdominatingateenager’slifeisessential.2.Tochangebadhabitsisnevereasy,evenwithmanyattempts.3.However,duringthisperiod,itcanbeeasyforsomeofthemtoformbadhabits.4.Afterall,itisnoteasytobreakbadhabits.Activity3SelfdirectedstudyFillintheblanksusingtherightformoftheword,andtrytochangeitintoanothersentencepattern.1.ItisimportantTomtogetthatjob.

Itiskindyoutohelpmewithmyhomework.

2.(talk)withhimisagreatpleasure.→Itis.

3.(help)othersisourduty.→.

4.IttookTom2hours.(作準(zhǔn)備)

Suggestedanswers:1.for;of2.Totalk;agreatpleasuretotalkwithhim3.Tohelp;Itisourdutytohelpothers4.tomakepreparationsItis+adj.+(forsb)todoSummary2:不定式作主語(yǔ),it作形式主語(yǔ)的常見結(jié)構(gòu):Itis+adj.+(forsb)todo例1Itiseasyformetolearnhowtodrive.學(xué)開車對(duì)我來(lái)說(shuō)很輕松。Itis+n.+todosth(anhonour,ourduty,apity,ashame)例2Itis+n.+todosth(anhonour,ourduty,apity,ashame)Ittakes/tooksbsometimetodosth.例3Itisourdutytotakecareofyou.照顧你是我們的責(zé)任。Ittakes/tooksbsometimetodosth.例4Ittakesmehalfanhourtodomyhousework.我花了半個(gè)小時(shí)做家務(wù)。Activity4parethetwosentencesbelowandtellthedifferenceinmeaning.1.Tolookafterchildrenisherjobtoday.她今天的工作是看孩子。2.Lookingafterchildrenisherwork.她的工作是照顧孩子。Summary3:不定式作主語(yǔ)和動(dòng)詞ing形式作主語(yǔ)和動(dòng)詞的區(qū)別:Suggestedanswers:Summary3:動(dòng)詞ing形式和不定式作主語(yǔ)都是說(shuō)明一個(gè)內(nèi)容。不定式通常表示一個(gè)將來(lái)的、具體的內(nèi)容;而動(dòng)詞ing形式則表示一種經(jīng)常性的、習(xí)慣的或抽象的概念。Moreexamples:Smokingisprohibitedhere.這里禁止抽煙。(抽象)Itisnotverygoodforyoutosmokesomuch.你抽這么多煙對(duì)你身體很不好。(具體)Climbingmountainsisinteresting.爬山很有趣。(已知的事或經(jīng)驗(yàn))Tofinishthetaskwilltakealongtime.要完成這項(xiàng)任務(wù)將要花費(fèi)很長(zhǎng)時(shí)間。(未完成的事或目的)StepⅢPractice：pletethesentences.Jointhewordstomakefullsentencesusingtheinfinitive.1.important/avoid/passivecigarettesmoking.___________________________________________________________2.willtake/nutritionspecialist/abalanceddietmenu/make/anhour/foryou.___________________________________________________________3.useful/turnto/fitnessconsultant/foradvice___________________________________________________________4.illegal/dangerous/take/drugs___________________________________________________________5.harmful/skipbreakfast/often____________________________________________________________Suggestedanswers:1.Itisimportanttoavoidpassivecigarettesmoking.2.Itwilltakeanutritionspecialistanhourtomakeabalanceddietmenuforyou.3.Itisusefultoturntofitnessconsultantforadvice.4.Itisillegalanddangeroustotakedrugs.5.Itisharmfultooftenskipbreakfast.StepⅣProductionActivity4pletetheconversationwiththecorrectformsofthephrasesintheboxandmakesimilarconversationsindailylifeusinginfinitiveassubjectwithyourpartner.beginwithbeincontrolofmakeachoicedecideonmakeupone’smind1.A:Hello,doctor.Iwanttoloseweight,butIjustcan’tseemtodoit.Whatcanyoudotohelpme?B:Well,first,it’snecessarytowhatyoueat.Cutoutallfattyfoodandsugarydrinks,andeatmorefruitandvegetables.

2.A:Ireallyneedtoawaytoexercisemore.Icoulduseafitnessapp,butmyphone’sfull.

B:Sodeleteafewfiles.I’msuretheappdoesn’ttakeupmuchspace.3.A:Beforeexercising,alwaysdoafewwarmupsto