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1、Unit 4 Global warmingReading选修六选修六Pre-readingTHEEARTHISBECOMINGWARMERBUTDOESITMATTER?ReadingAre the risks too great?Socanyoupredictthefutureoftheglobalwarming?1)Howmanyparagraphsdoesthereading2)Makeadivisionofthetext.Read the passage quickly(3)textconsistof?Pleasenumberthem.Fast-ReadingMain ideas of
2、 each part:Part1Part1(1)(1)Introduceadebateovertheissueofglobalwarming.raisingaquestionPart2Part2(2-5)(2-5)Howglobalwarmingcomesabout.giving examples,usinggraphs,explanation Part3Part3(6)(6)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Part3Part3(7)(7)Itsuptoreaderstothinkanddecidewhe
3、therpeopleshoulddosomethingaboutglobalwarmingornot.givingexamples,makingcontrastleavingaquestionGet to know global warmingnWhat ideas/concepts about global warming are conveyed by the author?ngreen housengreem house effectnreal meaning of the rise of the temperature by one degree ndifferent attitude
4、s towards global warming1.Have you ever seen a greenhouse?is made of glass used for growing plants,especially during cold weather.2.Howdoesthegreenhousework?Theairinsidewaswarmbecausetheglasstraps(挡住挡住,吸收吸收)theheatfromthesunandkeepsitfromescaping(逃跑逃跑).Thismakesthegreenhouseheatup(热量热量上升上升)andsothep
5、lantscangrowThroughout(在在期间期间)thecoldperiod.3.What are Greenhouse Gases?Methane4Ozone51Carbondioxide2Watervapor1 1Nitrousoxide34.GreenhouseEffectGlobal warmingGreenhousegasestrappedtheheatfromthesun,whichcausesthetemperatureofearthgoesup.Greenhouse effect5.the functionof the greenhouse effectnIt is
6、similar to the function of a quilt:keep the earth at a certain temperature.nBut if there is added carbon dioxide,the temperature will rise.6.The cause of the increase of the temperaturenhuman activities:a.burning of fossil fuels b.destruction of the green plants7.Why does the increase of one degree
7、Fahrenheit astonish the scientists so much?nIt shows that the rise of the temperature in recent years is speeding up.nIt can bring disastrous effects on human beings.thetwographsThefirstgraphshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.Thesecondgraphshowsthecarbondioxidecontenti
8、ntheatmospherefrom1957to1997.fromaround315partspermilliontoaround370partspermillionHugequantitiesofextracarbondioxideFrom1957to19978.the disastrouseffects of global warmingvariseinthesealevelvSeverestorms,droughts,famines,thespreadofdiseases,andthedisappearanceofspecies9.Whatdothethreescientiststhin
9、kaboutglobalwarming?believesitistheburningofmoreandmorefossilfuelsthatisresultinginabigincreaseincarbondioxide.(harmful)Dr.JaniceFosterCharles KeelingGeorge Hambleythinkstheeffectsofglobalwarmingcouldbeveryharmfulthinks global warming willbemildwithfewbadenvironmentalconsequences.(notharmful)10.The
10、authorsattitude towardsglobal warmingnIndifferentnSubjectivenObjective nuninterestedWhatweshoulddotoprotectourearth?Discussion:1.Reducetheburningoffossilfuels2.Planttrees3.Usebagsthatcanberecycled 1.Iparevt.1)比较比较;对照对照comparewith表示表示“把把与与相比相比(同类相比同类相比)”如：如：Compareyouranswerswiththoseatthebackofthebo
11、oktoseeiftheyareright.把你的答案同书后面的答案对照一下把你的答案同书后面的答案对照一下,看看是否正确。看看是否正确。Language points 2)喻为喻为;比拟比拟compareto表示表示“把把比做比做(异异类相比类相比,比喻比喻)”如：如：Manslifeisoftencomparedtoacandle.人生常被比为蜡烛。人生常被比为蜡烛。Myhandwritingcannotbecomparedwithmyfathers.我的书法不能与我父亲的相比。我的书法不能与我父亲的相比。Shakespearecomparedtheworldtoastage.莎士比亚把人
12、世比做舞台莎士比亚把人世比做舞台。知识拓展知识拓展comparedto/with与与相比相比,一般在句子中作状语一般在句子中作状语。Comparedto/withmanywomen,eabout:发生发生,造成造成,相当于相当于happen你能告诉我事情是怎么发生的吗？你能告诉我事情是怎么发生的吗？Canyoutellmehowtheaccidentcameabout?随着电的使用随着电的使用,种种大变化发生了。种种大变化发生了。Withtheuseofelectricity,eout出现出现;传开传开;公开公开comeup发生、举行发生、举行;出现出现2.Sohowhasthiscomeab
13、outanddoesitmatter?3.Thereisnodoubtthat.doubt1)作不可数名词作不可数名词,作作“疑惑疑惑;怀疑怀疑”肯定句中肯定句中doubt多接多接whether(一般不用一般不用if代替代替)同位语从句。如同位语从句。如:Theressomedoubt_hellkeephispromise.他会不会信守诺言还难说。他会不会信守诺言还难说。Shehadherdoubts_thenewbookwouldsellwell.她怀疑新书是否会畅销。她怀疑新书是否会畅销。whetherwhether否定句中否定句中doubt多接多接that同位语从句。如同位语从句。如:T
14、hereisnodoubt_theywillaskyouforhelp.毫无疑问毫无疑问,他们会请你帮忙的。他们会请你帮忙的。Ihavenodoubt_youwillsucceed.我毫不怀疑你会成功的。我毫不怀疑你会成功的。2)作及物动词常用于下列句型中作及物动词常用于下列句型中,作作“怀疑怀疑;不能肯定不能肯定;不大相信不大相信”解解,一般不用进行时态。一般不用进行时态。thatthat用于否定句或疑问句用于否定句或疑问句,后接后接that引导的宾语引导的宾语从句。如从句。如:Idontdoubt_heistellingthetruth.我毫不怀疑他在讲真话。我毫不怀疑他在讲真话。Doyo
15、udoubt_hewillwinthematch?你怀疑他会赢这场比赛吗你怀疑他会赢这场比赛吗?用于肯定句用于肯定句,一般接一般接whether或或if引导的宾语引导的宾语从句。从句。如如:Idoubt_wewillmakeaprofitoutofit.我认为我们不可能从此事中获利。我认为我们不可能从此事中获利。Wedoubt_shewillbepersuaded.我们不知道她会不会被说服。我们不知道她会不会被说服。whether/ifwhether/ifthatthat考点考点1Thereisnodoubtthat.是固定是固定句型句型,意为意为“毫无疑问毫无疑问”,that引导的引导的是同
16、位语从句，用来进一步补充说明是同位语从句，用来进一步补充说明doubt的具体内容。如：的具体内容。如：Someresearchersbelievethatthereisnodoubt_acureforAIDSwillbefound.A.whichB.that C.what D.whetherB5.subscribeto1)同意同意;支持支持Idontsubscribetosuchviews.我不同意这样的观点。我不同意这样的观点。2)对对捐款捐款Manypeoplesubscribedliberallytotherelieffund.许多人为救灾基金慷慨解囊。许多人为救灾基金慷慨解囊。3)(在
17、文件等下面在文件等下面)签名签名Hesubscribedhisnametoapetition.他在请愿书上签名。他在请愿书上签名。4)订阅订阅(书籍等书籍等)HesubscribedtoReadersDigest.他订阅他订阅读者文摘读者文摘。7.quantityn.数量数量;量量“alarge/smallquantityof+不可数名词不可数名词和可数名词复数和可数名词复数”表示表示“大量的大量的/少量的少量的”,也可以用也可以用“large/smallquantitiesof+不可数名词或可数名词复数不可数名词或可数名词复数”来表达。来表达。用法归纳用法归纳:aquantityof大量的大
18、量的quantitiesof大量的大量的Thereisasmallquantityofwaterleftinthebottle.瓶子里还剩下少量的水。瓶子里还剩下少量的水。Shehasquantitiesofgoodclothes.她有许多好衣服。她有许多好衣服。特别提示特别提示aquantityof后可接不可数名词或后可接不可数名词或可数名词的复数形式。当它修饰名词可数名词的复数形式。当它修饰名词作主语时作主语时,谓语动词用单数谓语动词用单数;而而quantitiesof后同样可接不可数名词后同样可接不可数名词或可数名词的复数形式或可数名词的复数形式,但谓语用复数。但谓语用复数。amount
19、sof+不可数名词充当句子不可数名词充当句子的主语时的主语时,其谓语动词用复数。其谓语动词用复数。12.opposevt.反对反对;反抗反抗如：如：Iamopposedtogoingshoppingwithothers.我反对与他人一起外出购物。我反对与他人一起外出购物。Heisstronglyopposedtotheplan.他强烈反对这一计划。他强烈反对这一计划。opposesth./doingsth.反对某事反对某事/做某事做某事beopposedtosth./doingsth.反对某事反对某事/做某事做某事oppose后若接动词后若接动词,则用其动名词形式，则用其动名词形式，而不用动词
20、不定式。而不用动词不定式。opposedoingsth.=objecttodoingsth.反对做某事反对做某事Theyoungmanopposed/objectedtoturningtohisparentsforhelp.这个年轻人反对向他的父母求助。这个年轻人反对向他的父母求助。易混辨析易混辨析oppose(尤指采取行动尤指采取行动)反对反对,反抗反抗(某事某事)beopposedto一方面相当于一方面相当于beagainst“反对反对”;另一方面相当于另一方面相当于beoppositeto“相对相对”。13.consequencen.结果结果,后果后果,影响影响ninconsequenc
21、e因此因此nasaconsequence结果结果nasaconsequenceof由于由于的结果的结果nItrainedyesterdayandinconsequencethematchwascanceled.nHestudiedhard,andinconsequencehepassedtheexam.15.rangev.排列排列,使成行使成行;偏袒偏袒,站在站在的方面的方面n.范围范围(尤指从尤指从到到各种种类各种种类,可供选择的可供选择的范围等范围等,可加不定冠词可加不定冠词);排列排列beyondtherangeof超越超越的范围的范围outofonesrange某人达不到的某人达不到的
22、这家商店商品品种多。这家商店商品品种多。Theshopkeeps_.常可用于常可用于:1)被动结构被动结构2)rangeoneself；3)rangefromto/betweenand从从到到不等不等awiderangeofgoods1.Alargeq_ofriceisbadlyneededhere.2.Studentsarefromawider_ofbackgrounds.3.Shestudiedhard,andinc_shepassedtheexam.4.Theparkattracts4millionvisitorsp_year.uantityangeonsequenceerI.I.根据句
23、意及所给单词的首字母或汉语根据句意及所给单词的首字母或汉语 提示提示,写出各单词的正确形式写出各单词的正确形式。II.根据句意根据句意,选择适当的单词或短语填空选择适当的单词或短语填空1.climate;weathera.Itsverydifficultforhertogetusedtothedryandcold_there.b.Howwewishthesunny_couldkeepupforanotherseveraldays!e about;come acrossa.Ivenever_anyonequitelikeherbefore.b.Pleasetellmehowtheaccident
24、_.Iamstillinthedark.climateweathercomeacrosscameabout3.quantity;qualitya.Muchofthelandwasofpoor_.b.Buyvegetablesinsmall_,foryourimmediateuse.4.result in;result froma.Theaccident_thedeathofthreepeople.b.Hisfailure_notworkinghardenough.qualityquantitiesresultedinresultedfrom5.glance;glare;starea.He_angrilyatheracrossthedinnertable.b.She_atthepageforseveralminutes,tryingtounderstand.c.She_roundtheroombeforesheleft.glaredstaredglanced