高中英语Unit 22 Lesson 1 Global Warming课件1 北师大版 选修

1,LESSON1GLOBALWARMING,1GlobalWarming,Ingroupsdiscusswhatyouknowaboutglobalwarming.Lookatthepicturestogetideas.,TrafficJam,Factory,5,ThegreenhouseeffectistheriseintemperaturethattheEarthexperiencesbecausecertaingasesintheatmosphere(watervapor,carbondioxide,nitrousoxide,andmethane,forexample)trapenergyfromthesun.Withoutthesegases,heatwouldescapebackintospaceandEarthsaveragetemperaturewouldbeabout60Fcolder.Becauseofhowtheywarmourworld,thesegasesarereferredtoasgreenhousegases.,TheGreenhouseEffect,TheGreenhouseEffect,7,Withoutthisgreenhouseheating,theEarthsaveragetemperaturewouldbeonlyabout-73C(-100F);eventheoceanswouldbefrozenundersuchconditions,suchastheMoonandtheMars.,Mars,Moon,8,WhatAreGreenhouseGases?,Somegreenhousegasesoccurnaturallyintheatmosphere,whileothersresultfromhumanactivities.Naturallyoccuringgreenhousegasesincludewatervapor,carbondioxide,methane,nitrousoxide,andozone.Certainhumanactivities,however,addtothelevelsofmostofthesenaturallyoccurringgases.,9,Owingtotheriseinatmosphericcarbondioxidecausedbymodernindustrialsocietieswidespreadcombustionoffossilfuels(coal,oil,andnaturalgas),thegreenhouseeffectonEarthmaybeintensifiedandlong-termclimaticchangesmayresult.,Whenfacedwiththisquestion,asindividualsshouldrecognizethatcollectivelywecanmakeadifference.,Whatdifferencecanwemake?,Individual,Takingactiononglobalwarming(orclimatechange)issimilar.Insomecases,itonlytakesalittlechangeinlifestyleandbehaviortomakesomebigchangesingreenhousegasreductions.Forothertypesofactions,thechangesaremoresignificant.Whenthatactionismultipliedbythe1.3billionpeopleintheChina.Orthe6billionpeopleworldwide,thesavingsaresignificant.,Takingpublictransportlikebusescanreducegreenhousegasemissions,AndTakingtraincanalsohelpareductionofgreenhousegas.,Therecyclingsymbol,Buytherecycledproducts,Recycledproducts,Recyclingthebottles,Yourglassbottlescouldberecycledintohouseinsulation,plasticbottlescouldbemadeintoacosyfleecejacket.,Paperrecycling,yourpapercouldbecomepartofaroadorrace-track,usinglow-flowshowerheads,buyingenergy-efficientlightbulbs,replace,with,Vocabulary,Usetheexpressionsintheboxinthecorrectformtocompletethesentences.beyondourcontrol,pumpinto,asaresultof,inlargequantities,referto,speedup1Waterwasthefishpondfromtheriver.2Weallneedtotofinishintime!,pumpedinto,speedup,3Thereisnothingmorewecando.thesituationisnow.4theaccident,sheisnowafraidofwater.5Thescientistglobalwarmingatleastthreetimesinhisspeech.6Thefactorywasproducinggreenhousegases.,beyondourcontrol,Asaresultof,referredto,inlargequantities,Grammar:Reporting,Whatverbsareusedinthetexttoreportthesestatements?Example1=toreportthat1HumanbeingsarecausingchangesintheEarthsclimate.,2GasespumpedintotheEarthsatmosperehavebeenspeedinguptheprocessofglobalwarming.,toreportthat,toclaimthat,5Globalwarmingwillcausedramaticclimatechangesincludingmorefrequentfloods,heatwaves,anddroughts.,3Globalwarmingcouldbeoneofthebiggestenvironmentalproblemsfacingthe21stcentury.,tobelievethat,toinsistthat,4Globalwarmingismostlyduetohumanactivities.,towarnthat,Lookatthesesentencesfromthetextandexplainwhytheunderlinedverbsarenotthesametenseasthereportingverbs.,1RecentreportfromtheIPCCwarnedthatglobalwarmingwillcausedramaticclimatechanges.,2ScientistfoundthatthetemperatureoftheEarthiscontrolledbygreenhousegases.,Becauseitisinthefuture,Becauseitisageneraltruth,Matchthesentenceswithappropriatereportingverbsfromthelist.Thenwritethereportedsentences.,admit,boast,forbid,inquire,invite,order,suggest,threaten1Wellclosecreditlinesifyoudontreducecarbondioxideemissions.,TheythreatenedtoclosethecreditlinesifwedontreduceCabondioxideemissions.,3Whydontyoudropintonight?,2OK,youareright,somepoisionouschemicaldidescapeintotheatmospere.,Theyadmittedthatsomepoisonouschemicalshadescapedintotheatmosphere.,He/She/Theyinvitedmetodropintonight.,He/She/Theyorderedmetostandupimmediately.,He/She/Theyforbadeustouseourdictionariesduringthetest.,He/Sheboastedthathe/sheisthebeststudentinthatschool.,4Standupimmediately!,5Imthebeststudentinthisschool!,6Youcantuseyourdictionariesduringthetest.,8Isthebusservicerunningaccordingtothetimetabletoday?,He/She/Theysuggestedhaving/thatweshouldhaveacupoftea.,I/He/She/They/Weinquiredifthebusservicewasrunningaccordingtothetimetabletoday.,7Shallwehaveacupoftea?,10usethefollowingverbstoreportthetwodialogues.,admit,advise,promise,warnTom:Idontthinkyoushouldplaythegametoday,John.John:Youreright.Imstillalittlebitill,butIpromiseIwontoverdoit.,TomadvisedJohnnottoplaythegametoday.,JohnadmittedthatTomwasrightbecausehewasalittlebitill.Hepromisednottooverdoit.,Tom:Becareful.IfyouyunaroundtoomuchinthisWeatheryoumaygetanotherattackofthe“flu”.,TomwarnedJohntobecarefulbecauseifheranaoundtoomuchintheweatherhemightgetanotherattackoftheflu.,b)accuse,beg,complain,deny,explain,refuseDaughter:Mum,please,willyoubuymethisCD?Ivealwayswantedit.Mother:Sarah,youknowIcantaffordit.Whydoyoualwaysaskmetobuyyouexpensivethings?,SarahbeggedhermothertobuyhertheCDbecauseshealwayswantedit.,Hermotherrefusedandexplainedthatshecouldntaffordit.Shecomplainedthatherdaughterwasalwaysaskinghertobuyherexpensivethings,Thedaughterdeniedthis.Sheaccusedhermotherofneverbuyingherthethingsshewantedbutonlythethingshermotherliked.,Daughter:Thatsnotture.YoujustneverbuymethingsthatIwant,onlythosethatyoulike!,Languageinuse,11Reportthefollowingstatementsthatyouheardat9a.m.thismorning.Doyouneedtochangethetense?1“Womenlivelongerthanmen.”Iheardthat2“Ourgalaxycontainsseveralthousandmillionstars.”Anastronomerannounedthat,Iheardthatwomenlivelongerthanmen.,Anastronomerannounedthatourgalaxycontainsseveralthousandmillionstars.,3“The2016OlympicswillbeorganisedinAfrica.”Asportsexpertsaidthat4“Thisroomistoohot.”Jonathancomplainedthat5“Thehurricanehaskilled9people.”Thenewspaperreported,Asportsexpertsaidthatthe2016OlympicswillbeorganisedinAfrica.,Jonathancomplainedthatthisroomwastoohot.,Thenewspaperreportedthehurricanehadkilled9people.,Grammar:Reportingverbs,Whenusingreportedspeech,moststudentslearntousesay;tellandask:e.g.Iamgoingtotheshop.Hesaid(that)hewasgoingtotheshop.Sitdownandopenyourbooks.Shetoldustositdownandopenourbooks.Willyoucomewithustomorrow?HeaskedmeifIwouldgowiththemthefollowingday.,AnativespeakerofEnglish,however,willoftenusereportingverbsotherthanjustsay,tellandask.Comparethefollowing:,Ididntdoit!Hesaidthathehadntdoneit.HedeniedthathehaddoneitORHedenieddoingit.Illbringthebookbacktomorrow.Shesaidthatshewouldbringthebookbackthefollowingday.Shepromisedtobringthebookbackthefollowingday.,Pleasewillyouthinkaboutitsomemore?HeaskedmeifIwouldthinkaboutitsomemore.Hebeggedmetothinkaboutitsomemore.Firstyoushouldputthemoneyintheslotandthenyoushouldpressthebutton.ShesaidthatIshouldfirstputthemoneyintheslotandthenpressthebutton.SheexplainedwhatIshoulddo.,Noticethatdifferentreportingverbsarefollowedbydifferentstructures,i.e.deny+that-clauseORdeny+-ingformpromise+infinitivebeg+object+infinitive,However,thereareanumberofotherreportingverbswhichcanmoreaccuratelydescribewhatsomeonehassaid.Theseverbstakeavarietyofstructures.Thefollowinglistgivesyoureportingverbsinvariouscategoriesbasedonsentencestructure.Noticethatanumberofverbscantakemorethanoneform.,(1)verb+object+infinitive,advise;encourage;in