新概念第二册第43课课件

Lesson43OvertheSouthPoleLesson43

F

FouroceansintheworldthePacificOceantheIndianOceantheArcticOceanAtheAtlanticOcean

WhatdoyouknowabouttheSouthPolepenguinsWhatdoyouknowabouttheSouNewwordsandexpressionspolen.（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NewwordsandexpressionsFirstlistenandthenanswerthequestion.Firstlistenandthenanswert听录音，然后回答以下问题。

Howwastheplaneabletoclearthemountains?TheAmericanexplorerorderedhismentothrowouttwoheavyfoodsackssotheplaneroseto10000feet.听录音，然后回答以下问题。TheAmericanexplAskandanswer:1.WhendidthemansuccessfullyflyovertheSouthPoleforthefirsttime?2.WhosuccessfullyflewovertheSouthpoleforthefirsttime

?3.Wouldtheplanecrash?4.Howdidtheyclearthemountain?5.WhydidByrdnowknowthathewouldbeabletoreachtheSouthPole?6.Wasthereanydifficulties?Askandanswer:1.WhendidtheReadandjudgeTheAmericanexplorer,R.E.Byrd,successfullyflewovertheNorthPolefirsttime.2.Byrdandhiswereabletobakealotofphotographsofthemountainsthatlaybelow.Theplanecouldonlygetoverthemountainsifitroseto10,000miles.AfterByrdorderedhismentothrowouttwoheavyfoodsacks,theplanewasabletorise.TTFFReadandjudgeTheAmericanexp

In1929,threeyearsafterhisflightovertheNorthPole,theAmericanexplorer,R.E.Byrd,successfullyflewovertheSouthPoleforthefirsttime.Though,atfirst,Byrdandhismenwereabletotakeagreatmanyphotographsofthemountainsthatlaybelow,theysoonranintoserioustrouble.Atonepoint,itseemedcertainthattheirplanewouldcrash.In1929,threeyearsafterhiItcouldonlygetoverthemountainsifitroseto10,000feet.Byrdatonceorderedhismentothrowouttwoheavyfoodsacks.Theplanewasthenabletoriseanditclearedthemountainsby400feet.ByrdnowknewthathewouldbeabletoreachtheSouthPolewhichwas300milesaway,fortherewerenomoremountainsinsight.Theaircraftwasabletoflyovertheendlesswhiteplainswithoutdifficulty.Itcouldonlygetoverthemoucan“can"isoneofthemostcommonlyusedmodalverbsinEnglish.Itcanbeusedtoexpressabilityoropportunity,torequestorofferpermission,andtoshowpossibilityorimpossibility.Examples:Icanrideahorse.ability

WecanstaywithmybrotherwhenweareinParis.opportunity

Shecannotstayoutafter10PM.permission

Canyouhandmethestapler?

request

Anychildcangrowuptobepresident.possibility

can“can"isoneofthemostcould“could"isusedtoexpresspossibilityorpastabilityaswellastomakesuggestionsandrequests."Could"isalsocommonlyusedinconditionalsentencesastheconditionalformof"can."Examples:Extremeraincouldcausetherivertofloodthecity.possibility

Nancycouldskilikeaprobytheageof11.pastability

Youcouldseeamovieorgoouttodinner.

suggestion

CouldIuseyourcomputertoemailmyboss?request

WecouldgoonthetripifIdidn'thavetoworkthisweekend.conditional

“could"cannotbeusedinpositivesentencesinwhichyoudescribeamomentaryorone-timeability.e.g.Yesterday,Icouldliftthecouchbymyself.NotCorrect

could“could"isusedtoexcan和beableto的区别can与beableto用法上的区别

口语中,can与beableto在用法上既有相同的一方面,又有不同的地方,这是应该引起注意的。当它们表示能力的时候，是同义的。如：

Hecanspeaktwoforeignlanguages.

Heisabletospeaktwoforeignlanguages.can和beableto的区别can与beable表示过去通过努力终于做成了某事要用beableto，而不能用can。如：

Iwasabletoswimtothebankaftertheboatturnedover.

can和beableto都可以表示能力.can泛指一般的能力,而且只有两种形式,即:can,could．beableto则主要指具体做到了某件事的能力，其形式主要是靠be发生变化，所以形式比can多．可以说：Icanswim.Iamabletoswim.但是不能说：Allthepeoplecouldescapefromthebigfireintime.只能说：Allthepeoplewereabletoescapefromthefireintime.表示过去通过努力终于做成了某事要用beableto，而不can能表猜测，beableto不能。can的这种用法主要用于疑问句和否定句。

Somebodyisknockingatthedoor.Whocanitbe?

Itcan’tbeourteacherwhoisknockingatthedoor.

其肯定形式是mustbe。如:

Itmustbeourteacherwhoisknockingatthedoor.can能表猜测，beableto不能。can的这种用法主SumupthelanguagepointsSumupthelanguagepoints

Phrases1.能做某事:beableto2.飞越:flightover=flyover3.第一次:forthefirsttime4.首先:atfirst5.拍照:takeaphotograph=takeapicture6.大量的:agreatmanyof7.陷入困境:runintotrouble=getintotroublePhrases1.能做某事:beableto8.在某一个地方:atonepoint9.似乎肯定…:Itseemscertainthat…10.丢弃:throwout11.在视线中:insight8.在某一个地方:atonepoint美国探险家R.E.伯德在飞越北极3年之后，于1929年第一次飞越了南极。虽然开始时伯德和他的助手们拍下了飞机下面连绵群山的大量照片，但他们很快就陷入了困境。在有个地方，飞机似乎肯定要坠毁了。只有在飞至10,000英尺的高度时，它才能飞过这些山头。伯德马上命令他的助手们把两个沉重的食物袋扔掉，于是飞机可以上升了，它在离山头400英尺的高度飞越了过去。伯德这时知道他能够顺利飞抵300英里以外的南极了，因为前面再没有山了。飞机可以毫无困难地飞过这片茫茫无际的白色原野！美国探险家R.E.伯德在飞越北极3年之后，于1929年第1.美国探险家R·E·伯德在飞越北极3年之后，于1929年第1次飞越了南极。（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）forthefirsttime表示“第一次”，time在这里表示“次”、“回”，thistime,lasttime,nexttime,anothertime,eachtime,forthelasttime等：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.美国探险家R·E·伯德在飞越北极3年之后，于1929年2.虽然开始时伯德和他的助手们拍下了飞机下面连绵群山的大量照片，但他们很快就陷入了困境。（1）连词though引导的是让步状语从句，其含义为“虽然……”、“尽管……”。这个从句中的时间状语atfirst被单独用逗号隔开了，它如果按正常的词序应放在从句的末尾，但有可能会引起误解。（2）atfirst与主句中的soon形成时间上的照应，表示先后次序。（3）takeaphotographof表示“拍……的照片”Hetookaphotographofhishousebeforehelefthome.他离家前给他家的房子拍了一张照片。（4）thatlaybelow为themountains的定语从句，that为从句的主语。（5）runintotrouble的含义与getintotrouble相似，表示“陷入困境”Eachtimeheranintotrouble,heaskedhisparentsforhelp.每当他陷入困境时，他都向他父母求助。2.虽然开始时伯德和他的助手们拍下了飞机下面连绵群山的大3.在有个地方，飞机似乎肯定要坠毁了。（1）atonepoint在此处可以解释为“在有个地方”，但它通常的含义为“在某一时刻”，poin