《Unit 2 Learning About Language》第2课时教学课件【高中英语人教版】

Unit2HealthyLifestyleLearningAboutLanguagePeriod2人教版高中英语选择性必修第三册Howdoesthe“habitcycle”work?RevisionCUEROUTINEREWARDHABITCYCLEObservingandExploringWhatarethefunctionsoftheinfinitivesinthesesentences?1.Tochangebadhabitsisnevereasy.2.Topreventharmfulhabitslikethesefromdominatingateenager’slife

isessential.⸙todosth+linkingverb+表语

动词不定式作主语ObservingandExploring⸙It+predicate（谓语）/linkingverb+...+todosth

动词不定式作真正主语3.Ittookthesurgeonthreehourstofinishmymother’slungsurgery.4.Itwasnotpolitetodisturbyourneighbourswithloudmusiclastnight.It作形式主语WorkingoutTherulesoftheinfinitiveasthesubject动词不定式作主语1.动词不定式置于句首

(Not)todosth+predicate(谓语)+...e.g.Toseeistobelieve.百闻不如一见。

注意：有时也可在动词不定式前加疑问词。疑问词包括疑问代词

who\whom\what\which\whose以及疑问副词when\where和how。

此外连接词whether也适用。e.g.Howtobreakthebadhabitisthequestion.如何改变坏习惯是个问题。

Wheretogohasnotbeendiscussed.去哪还没有讨论。Workingout2.用it作形式主语，放在句首，把真正的主语——动词不定式置于句后。It+predicate(谓语)+...+todosth常用句型：It+is/was+adj.+(forsb)todosth对于某人来说做某事是怎么样的Ittakes/took/willtakesbsometimetodosth某人花费一些时间做某事e.g.Itisnecessarytoplanttreeseveryyear.每年植树是必要的。Ittookmethreemonthstofinishthiswork.我花了三个月的时间完成这项工作。Workingout3.两种句型之间的转换Tochangebadhabitsisnevereasy.Itisnevereasyto

changebadhabits.主语形式主语真正主语WorkingoutThedifferencebetweentheinfinitiveasthesubjectandthegerund(动名词)asthesubjectSmoking

isprohibitedhere.Itisnotverygoodforyoutosmokesomuch.Spittingontheground

isnotagoodhabit.Itisnotpoliteofyoutospitontheground.v-ing表示抽象动作todo表示具体动作❶WorkingoutClimbingmountainsisinteresting.Toclimbthismountain

needsoureffortandpersistence.Drivingacarduringtherushhouristiring.Itwillbetiringtodrivethecartoyourhome.v-ing表示一件已知的事或经验todo表示未完成的事或目的❷ApplyingSentencepatterntransformation.1.Workouttheproblemisnoteasy.（it作形式主语）______________________________________________________________________2.Ittookthesurgeonthreehourstofinishmymother’slungsurgery.（todo作主语）

______________________________________________________________________3.Itwasnotpolitetodisturbyourneighbourswithloudmusiclastnight.（todo作主语）

______________________________________________________________________Tofinishmymother’slungsurgerytookthesurgeonthreehours.Todisturbyourneighbourswithloudmusiclastnightwasnotpolite.It’snoteasytoworkouttheproblem.ApplyingJointhewordstomakefullsentences,andthenjointhesentencestomakeaparagraph.1.important/avoid/passivecigarettesmoking

_____________________________________________2.willtake/nutritionspecialist/abalanceddietmenu

/make/anhour/foryou__________________________________________________________________________________________Itisimportanttoavoidpassivecigarettesmoking.Itwilltakeanhourfornutritionspecialisttomakeabalanceddietmenuforyou.Applying3.useful/turnto/fitnessconsultant/foradvice

_____________________________________________4.illegal/dangerous/take/drugs_____________________________________________5.harmful/skipbreakfast/often

_____________________________________________Itisusefultoturntoafitnessconsultantforadvice.Itisdangeroustotakeillegaldrugs.Itisharmfultoskipbreakfast(too)often.ApplyingSample:Togethealthyandgetridofbadhabits,sometimesitisalsoagoodideatogetprofessionalhelp.Itwilltakeanhourforanutritionspecialisttomakeabalanceddietmenuforyou.Itisalsousefultoturntoafitnessconsultantforadvice.Youcanalsohelpyourselfwithsomecommonsense.Forexample,itisharmfultoskipbreakfasttoooften.Itisimportanttoavoidpassivecigarettesmoking.And,ofcourse,itisdangeroustotakeillegaldrugstoo.ApplyingCompletetheconversationswiththecorrectformsofphrasesinthebox.1.A:Hello,doctor.Iwanttoloseweight,butIjustcan’tseemtodoit.

Whatcanyoudotohelpme?B:Well,first,it’snecessaryto_______________whatyoueat.Cut

outallfattyfoodandsugarydrinks,andeatmorefruitandvegetables.beginwithbeincontrolofmakeachoicedecideonmakeupone’smindbeincontrolofApplyingbeginwithbeincontrolofmakeachoicedecideonmakeupone’smind2.A:Ireallyneedto

___________awaytoexercisemore.Icouldusea

fitnessapp,butmyphone’sfull.B:Sodeleteafewfiles.I’msuretheappdoesn’ttakeupmuchspace.3.A:Beforeexercising,alwaysdoafewwarm-upsto____________.B:Iknow.ButthenIalwaysfeeltootiredtocontinue!decideonbeginwithApplyingbeginwithbeincontrolofmakeachoicedecideonmakeupone’smind4.A:ShouldIgoforapizzaorthefriedchicken?Ihate_______________

likethese.Youknowwhat—I’mgoingtoeatboth!B:Wow!Don’teattoomuchjunkfood—you’llgetfat.I’veactually______________________togoonadiet,soI’lljuststicktothe

fruitsalad.makingchoicesmadeupmymindApplyingChoosethebestanswers.1.__________alanguagerequirestimeandeffort.A.LearningB.Tolearn2.Itisnotalwayseasy__________upearly.

A.toget