新概念2-第43课-课件

Lesson43OvertheSouthPolecan/can’t/could/couldn’tIcandancethedisco.Ican’tperformballet.Icouldrowaboatoneyearago.Icouldn’tswimwhenIwasfour.flykites/makemodelplanes/takephotos/singEnglishsongs.ReviewFirstlistenandthenanswerthequestion.听录音，然后回答以下问题。Howwastheplaneabletoclearthemountains?TheAmericanexplorerorderedhismentothrowouttwoheavyfoodsackssotheplaneroseto10000feet.•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.WhendidthemansuccessfullyflyovertheSouthPoleforthefirsttime?•2.WhosuccessfullyflewovertheSouthpoleforthefirsttime?•3.Wouldtheplanecrash?•4.Howdidtheyclearthemountain?•5.WhydidByrdnowknowthathewouldbeabletoreachtheSouthPole?•6.Wasthereanydifficulties?In1929,threeyearsafterhisflightovertheNorthPole,theAmericanexplorer,R.E.Byrd,successfullyflewovertheSouthPoleforthefirsttime.Though,atfirst,Byrdandhismenwereabletotakeagreatmanyphotographsofthemountainsthatlaybelow,theysoonranintoserioustrouble.Atonepoint,itseemedcertainthattheirplanewouldcrash.Itcouldonlygetoverthemountainsifitroseto10,000feet.Byrdatonceorderedhismentothrowouttwoheavyfoodsacks.Theplanewasthenabletoriseanditclearedthemountainsby400feet.ByrdnowknewthathewouldbeabletoreachtheSouthPolewhichwas300milesaway,fortherewerenomoremountainsinsight.Theaircraftwasabletoflyovertheendlesswhiteplainswithoutdifficulty.canCanisoneofthemostcommonlyusedmodalverbsinEnglish.Itcanbeusedtoexpressabilityoropportunity,torequestorofferpermission,andtoshowpossibilityorimpossibility.Examples:Icanrideahorse.abilityWecanstaywithmybrotherwhenweareinParis.opportunityShecannotstayoutafter10PM.permissionCanyouhandmethestapler?requestAnychildcangrowuptobepresident.possibilityCouldCouldisusedtoexpresspossibilityorpastabilityaswellastomakesuggestionsandrequests.Couldisalsocommonlyusedinconditionalsentencesastheconditionalformofcan.Examples:Extremeraincouldcausetherivertofloodthecity.possibilityNancycouldskilikeaprobytheageof11.pastabilityYoucouldseeamovieorgoouttodinner.suggestionCouldIuseyourcomputertoemailmyboss?requestWecouldgoonthetripifIdidn'thavetoworkthisweekend.conditionalCouldcannotbeusedinpositivesentencesinwhichyoudescribeamomentaryorone-timeability.e.g.Yesterday,Icouldliftthecouchbymyself.NotCorrect比较can和beableto•表示成功地做了某事时，只能用was/wereableto，不能用could。Hecouldswimhalfwaybeforehegottired.(notcorrect)Hewasabletoswimhalfwaybeforehegottired.(correct)can用于表示“能力”时是指现在的能力，过去或将来的能力通常用was/wereableto或will/shallbeableto表示。Sumupthelanguagepoints习惯用语:dancethedisco/performballet/takephotos/wordout/take…to…/rowaboat/begoodat/singsongs/flyakite/makemodelplanes/beinhospital/haveagoodtime语法知识:情态动词:can/can’t【Newwordsandexpressions】生词和短语★polen.（地球的）极SouthPole南极NorthPole北极PoleStar北极星★liev.处于tellalie撒谎lien.谎言;liev.撒谎Eg.:Youlied.You,liar!lie,lied,lied撒谎lie/lai/,lay/lei/,lain/lein/处于,位于stayinbed/lieinbed躺在床上inbed介词短语,lievi.lie现在分词--lyinglayv.放,放置;layanegg下一个蛋layvt.laysth.放,放置lay,laid,laid★explorern.探险家explorev.探险explorationn.(科研相关)探险,探求,开发adventuren.冒险(追求刺激)venturen.冒险(为了财富,没有生命保障)★seemv.似乎，看起来seem+asif看起来似乎……他看起来似乎以前从来没有在英国居住过。HeseemsasifhehadneverlivedinEnglandbefore.seem+adj.他看起来很有钱。Heseemsrich.seemtobeHeseemstoberich.seemthat…看起来似乎……Itseemsthatheisrich.★clearv.越过(凌空、不接触地)越过,跳过，没有接触面的飞跃飞跃山峰clearthemountain那匹马越过了栅栏Thehorseclearedthefence.overadv.越过(距离)goover飞跃★plainn.平原plaingirl平凡的女孩•③lay是动词lie的过去式。表示“处于什么位置”。•lie与lay的区别：•（1）lie作“躺，卧、处于（位置）”解时，过去式为：lay,过去分词为：lain；•（2）lie作“撒谎”解时，过去式为：lied,过去分词为：lied；•（3）lay可作“放，摆，搁；产卵”解，其过去式和过去分词均为：laid•【例】Thebooksstill_____whereI_____themamonthago.A:lie,laidB:lay,laidC:lied,lainDlain,lied•此题选B。这句话的意思是：上个月前我“放”在那的书现在还“躺”在那里。★pointn.地点point点,一般指从飞机上向下看的点地点place,spotdot点@-at★seemv.似乎seem+asifseem+adv.seemtobeseemthat...Eg.:Heseemsrich.Heseemstoberich.Itseemsthatheisrich.itseemsthat...看起来似乎...seemasif看起来似乎Eg.:HeseemsasifhehadneverlivedinEnglandbefore.★crashv.坠毁crash(从上向下掉)aircrash空难strike撞击clash撞击,冲突★clearv.越过over越过(距离)clear(凌空)越过goover飞跃clearthemountain飞跃山峰Thehorseclearedthefense.★plainn.平原mountains高山plaingirl平凡的女孩Eg.:I'maplaingirl.课文讲解1、In1929,threeyearsafterhisflightovertheNorthPole,theAmericanexplorer,R.E.Byrd,successfullyflewovertheSouthPoleforthefirsttime.forthefirsttime第一次time表示“次，回”，还可以说thistime，lasttime，nexttime，anothertime，eachtime，forthelasttime我最后一次提醒你，如果你不快点，你就会赶不上火车的。Iremindyouforthelasttimethatifyoudon’thurry,you’llmissthetrain.下次你见到他的时候，把这些照片给他。Givehimthesephotosnexttimeyouseehim.（1）这句话包含两个同位语。threeyearsafter…为1929的同位语，作插入性的补充说明；R．E．Byrd作theAmericanexplorer的同位语。2、Though,atfirst,Byrdandhismenwereabletotakeagreatmanyphotographsofthemountainsthatlaybelow,theysoonranintoserioustrouble.连词though引导让步状语从句，其含义是“虽然……，尽管……”。它永远不与but连用。can...可能性（只用于现在式和过去式）beableto...可能性,成功地做（可用于各种时态）takeaphotographof…拍……的照片在他离开家之前，他给他的房子照了张照片。Hetookaphotographofhishousebeforehelefthome.runintotrouble=getintotrouble遇到麻烦，陷入困境每次他遇到困难了，他都向父母寻求帮助。Eachtimeheranintotrouble,heaskedhisparentsforhelp.3、Atonepoint,itseemedcertainthatthei