教案新人教版选修六Unit4Grammar教案.doc

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1、人教选修6Unit4GlobalWarmingGrammarTeachingmaterialNSEFCBook6——Unit4TeachingaimsEnablethestudentstomastertheusageoftheformitis/was...that.....TeachingimportantpointsHowtoenablethestudentstoknowthestructureandtheusageoftheformitis/was...that....TeachingdifficultpointsHowtohelpt

2、hestudentstomastertheusageoftheformitis/was...that....Teachingaidstaperecorder,slidesTeachingproceduresStep1RevisionT:Firstlet’scheckanswers.(slideshow)Discoveringusefulwordsandexpressions.(P28)1.CharlesKeelingcollected______onthecarbondioxidecontentintheatmosphereoverafo

3、rty-yearperiod.Hefoundthattheamountofcarbondioxide_______increasingduringthattime.2.Althoughweareburningcoalinhuge_________everyyear,wewon't________ofitforcenturies.3.Iftheamountofgreenhousegasescontinuesto_______wecouldbefacingaglobal__________.4.Manyscientistsbelievetha

4、tglobalwarminghas__________throughtheburningoffossilfuels.Theydonotthinkthatignoringtheissueisworththe____.5.______describesweatherconditionsoveraperiodofyearsinaparticularplace.6.The_____________ofarisingsealevelwouldbewidespreadflooding.7.TheuseofenergyinSusanna'scountr

5、yislow______________theuseofenergyintheUSA.8.Thewarmingoftheearthisa_____________thatcausesgreatconcern.9.The________showstemperaturechangesduringthe20thcentury.10.Onehectareofforestcanabsorb23tonsofcarbondioxide____year.Keys：1.datakepton2.quantities;runout3.buildup;catas

6、trophe4.comeabout;risk5.Climate6.consequence7.comparedto8.phenomenon9.graph10.perAnswerkeysforEx.2onPage28:Thefirstgraphshowstheglobal_______________between________and_________Thetemperature__________anddecreasedoverthisperiodbutonthewholeit_________byaround_________andit

7、shighestin2000.Therewasasteady_________________inthetemperatureduringthetwentyyearsafter1980.Wecanseefromthegraphthattheearthhasbecome___________sinceearlylastcentury.Thesecondgraphshowstheamountof______________intheatmospherefrom________to_______.Thecarbondioxide________

8、__steadilyoverthisforty-yearperiod.Itwentupfrom315to370parts___________million.Keys：Temperature；