Unit2HealthyLifestyleDiscoverUsefulStructures公开课导学案-高中英语人教版选择性

2019新人教高中英语选择性必修三Unit2HealthyLifestyleDiscoverUsefulStructures导学案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.动词不定式的位置：在位于动词之_______.2.单个的动名词做主语，位于动词用______数。多个动名词做主语，谓语动词用_______数。3.疑问词+不定式结构：与疑问词who,whom,whose,what,which,when,where,how等连用4.动词不定式在句中作主语,有时为了保持句子的平衡,避免头重脚轻,常用it作形式主语,而真正的主语放在句子的末尾。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.(作准备)

Suggestedanswers:1.for;of2.Totalk;agreatpleasuretotalkwithhim3.Tohelp;Itisourdutytohelpothers4.tomakepreparationsItis+adj.+(forsb)todoSummary2:不定式作主语,it作形式主语的常见结构:Itis+adj.+(forsb)todo例1Itiseasyformetolearnhowtodrive.学开车对我来说很轻松。Itis+n.+todosth(anhonour,ourduty,apity,ashame)例2Itis+n.+todosth(anhonour,ourduty,apity,ashame)Ittakes/tooksbsometimetodosth.例3Itisourdutytotakecareofyou.照顾你是我们的责任。Ittakes/tooksbsometimetodosth.例4Ittakesmehalfanhourtodomyhousework.我花了半个小时做家务。Activity4parethetwosentencesbelowandtellthedifferenceinmeaning.1.Tolookafterchildrenisherjobtoday.她今天的工作是看孩子。2.Lookingafterchildrenisherwork.她的工作是照顾孩子。Summary3:不定式作主语和动词ing形式作主语和动词的区别:Suggestedanswers:Summary3:动词ing形式和不定式作主语都是说明一个内容。不定式通常表示一个将来的、具体的内容;而动词ing形式则表示一种经常性的、习惯的或抽象的概念。Moreexamples:Smokingisprohibitedhere.这里禁止抽烟。(抽象)Itisnotverygoodforyoutosmokesomuch.你抽这么多烟对你身体很不好。(具体)Climbingmountainsisinteresting.爬山很有趣。(已知的事或经验)Tofinishthetaskwilltakealongtime.要完成这项任务将要花费很长时间。(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