新概念2-第43课-课件讲课资料.ppt

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1、Lesson43OvertheSouthPolecan/can’t/could/couldn’tIcandancethedisco.Ican’tperformballet.Icouldrowaboatoneyearago.Icouldn’tswimwhenIwasfour.flykites/makemodelplanes/takephotos/singEnglishsongs.Review听录音，然后回答以下问题。Howwastheplaneabletoclearthemountains?TheAmericanexplorerorderedhism

2、entothrowouttwoheavyfoodsackssotheplaneroseto10000feet.Newwordsandexpressions生词和短语polen.（地球的）极flightn.飞行explorern.探险家liev.处于seriousadj.严重的pointn.地点seemv.似乎crashv.坠毁sackn.袋子clearv.越过aircraftn.飞机endlessadj.无尽的plainn.平原Askandanswer:1.WhendidthemansuccessfullyflyovertheSouthPolefo

3、rthefirsttime?2.WhosuccessfullyflewovertheSouthpoleforthefirsttime?3.Wouldtheplanecrash?4.Howdidtheyclearthemountain?5.WhydidByrdnowknowthathewouldbeabletoreachtheSouthPole?6.Wasthereanydifficulties?In1929,threeyearsafterhisflightovertheNorthPole,theAmericanexplorer,R.E.Byrd,s

4、uccessfullyflewovertheSouthPoleforthefirsttime.Though,atfirst,Byrdandhismenwereabletotakeagreatmanyphotographsofthemountainsthatlaybelow,theysoonranintoserioustrouble.Atonepoint,itseemedcertainthattheirplanewouldcrash.Itcouldonlygetoverthemountainsifitroseto10,000feet.Byrdaton

5、ceorderedhismentothrowouttwoheavyfoodsacks.Theplanewasthenabletoriseanditclearedthemountainsby400feet.ByrdnowknewthathewouldbeabletoreachtheSouthPolewhichwas300milesaway,fortherewerenomoremountainsinsight.Theaircraftwasabletoflyovertheendlesswhiteplainswithoutdifficulty.can"Ca

6、n"isoneofthemostcommonlyusedmodalverbsinEnglish.Itcanbeusedtoexpressabilityoropportunity,torequestorofferpermission,andtoshowpossibilityorimpossibility.Examples:Icanrideahorse.abilityWecanstaywithmybrotherwhenweareinParis.opportunityShecannotstayoutafter10PM.permissionCanyouha

7、ndmethestapler?requestAnychildcangrowuptobepresident.possibilityCould"Could"isusedtoexpresspossibilityorpastabilityaswellastomakesuggestionsandrequests."Could"isalsocommonlyusedinconditionalsentencesastheconditionalformof"can."Examples:Extremeraincouldcausetherivertofloodtheci

8、ty.possibilityNancycouldskilikeaprobytheageof11.pastabilityYo