高中英语Unit 22 Lesson 1 Global Warming 课件1北师大版选修8.ppt

1 lesson1globalwarming 1globalwarming ingroupsdiscusswhatyouknowaboutglobalwarming lookatthepicturestogetideas trafficjam factory 5 thegreenhouseeffectistheriseintemperaturethattheearthexperiencesbecausecertaingasesintheatmosphere watervapor carbondioxide nitrousoxide andmethane forexample trapenergyfromthesun withoutthesegases heatwouldescapebackintospaceandearth saveragetemperaturewouldbeabout60 fcolder becauseofhowtheywarmourworld thesegasesarereferredtoasgreenhousegases thegreenhouseeffect thegreenhouseeffect 7 withoutthisgreenhouseheating theearth saveragetemperaturewouldbeonlyabout 73c 100f eventheoceanswouldbefrozenundersuchconditions suchasthemoonandthemars mars moon 8 whataregreenhousegases somegreenhousegasesoccurnaturallyintheatmosphere whileothersresultfromhumanactivities naturallyoccuringgreenhousegasesincludewatervapor carbondioxide methane nitrousoxide andozone certainhumanactivities however addtothelevelsofmostofthesenaturallyoccurringgases 9 owingtotheriseinatmosphericcarbondioxidecausedbymodernindustrialsocieties widespreadcombustionoffossilfuels 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 toreportthat1humanbeingsarecausingchangesintheearth sclimate 2gasespumpedintotheearth satmosperehavebeenspeedinguptheprocessofglobalwarming toreportthat toclaimthat 5globalwarmingwillcausedramaticclimatechangesincludingmorefrequentfloods heatwaves anddroughts 3globalwarmingcouldbeoneofthebiggestenvironmentalproblemsfacingthe21stcentury tobelievethat toinsistthat 4globalwarmingismostlyduetohumanactivities towarnthat lookatthesesentencesfromthetextandexplainwhytheunderlinedverbsarenotthesametenseasthereportingverbs 1recentreportfromtheipccwarnedthatglobalwarmingwillcausedramaticclimatechanges 2scientistfoundthatthetemperatureoftheearthiscontrolledbygreenhousegases becauseitisinthefuture becauseitisageneraltruth matchthesentenceswithappropriatereportingverbsfromthelist thenwritethereportedsentences admit boast forbid inquire invite order suggest threaten1we llclosecreditlinesifyoudon treducecarbondioxideemissions theythreatenedtoclosethecreditlinesifwedon treducecabondioxideemissions 3whydon tyoudropintonight 2ok youareright somepoisionouschemicaldidescapeintotheatmospere theyadmittedthatsomepoisonouschemicalshadescapedintotheatmosphere he she theyinvitedmetodropintonight he she theyorderedmetostandupimmediately he she theyforbadeustouseourdictionariesduringthetest he sheboastedthathe sheisthebeststudentinthatschool 4standupimmediately 5i mthebeststudentinthisschool 6youcan tuseyourdictionariesduringthetest 8isthebusservicerunningaccordingtothetimetabletoday he she theysuggestedhaving thatweshouldhaveacupoftea i he she they weinquiredifthebusservicewasrunningaccordingtothetimetabletoday 7shallwehaveacupoftea 10usethefollowingverbstoreportthetwodialogues admit advise promise warntom idon tthinkyoushouldplaythegametoday john john you reright i mstillalittlebitill butipromiseiwon toverdoit tomadvisedjohnnottoplaythegametoday johnadmittedthattomwasrightbecausehewasalittlebitill hepromisednottooverdoit tom becareful ifyouyunaroundtoomuchinthisweatheryoumaygetanotherattackofthe flu tomwarnedjohntobecarefulbecauseifheranaoundtoomuchintheweatherhemightgetanotherattackoftheflu b accuse beg complain deny explain refusedaughter mum please willyoubuymethiscd i vealwayswantedit mother sarah youknowican taffordit whydoyoualwaysaskmetobuyyouexpensivethings sarahbeggedhermothertobuyherthecdbecauseshealwayswantedit hermotherrefusedandexplainedthatshecouldn taffordit shecomplainedthatherdaughterwasalwaysaskinghertobuyherexpensivethings thedaughterdeniedthis sheaccusedhermotherofneverbuyingherthethingsshewantedbutonlythethingshermotherliked daughter that snotture youjustneverbuymethingsthatiwant onlythosethatyoulike languageinuse 11reportthefollowingstatementsthatyouheardat9a m thismorning doyouneedtochangethetense 1 womenlivelongerthanmen iheardthat 2 ourgalaxycontainsseveralthousandmillionstars anastronomerannounedthat iheardthatwomenlivelongerthanmen anastronomerannounedthatourgalaxycontainsseveralthousandmillionstars 3 the2016olympicswillbeorganisedinafrica asportsexpertsaidthat 4 thisroomistoohot jonathancomplainedthat 5 thehurricanehaskilled9people thenewspaperreported asportsexpertsaidthatthe2016olympicswillbeorganisedinafrica jonathancomplainedthatthisroomwastoohot thenewspaperreportedthehurricanehadkilled9people grammar reportingverbs whenusingreportedspeech moststudentslearntouse say tell and ask e g iamgoingtotheshop hesaid that hewasgoingtotheshop sitdownandopenyourbooks shetoldustositdownandopenourbooks willyoucomewithustomorrow heaskedmeifiwouldgowiththemthefollowingday anativespeakerofenglish however willoftenusereportingverbsotherthanjustsay tellandask comparethefollowing ididn tdoit hesaidthathehadn tdoneit hedeniedthathehaddoneitorhedenieddoingit i llbringthebookbacktomorrow 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 enco