1、Unit4globalwarming 完整版教学设计Unit4Globalwarming【learning aims】1.训练阅读能力以及提取文章信息的能力（extractinformation）2.了解日常生活中有关节能减排的小方法，培养低碳环保的生活理念。3.通过本节课的学习让学生能够制作出一幅英文海报。【Important points】1. 1.训练阅读能力以及提取文章信息的能力（extractinformation）2. 2.了解日常生活中有关节能减排的小方法，培养低碳环保的生活理念。【Difficult points】1.通过本节课的学习让学生能够制作出一幅英文海报。预习案【单词回
2、顾】1、_n.承诺；交托_vt.犯罪；承诺2、_vt.陈述；说明_n.国家3、_n.生长；增长_vi.生长4、_n.生存；存在_vi.存在5、_n.贡献_vt.捐助6、_n.分歧；不一致_vi.不同意7、_n.结果；后果；影响8、_n.种类；范围9、_n.环境；情况10、_adj.平均的；普通的；普遍的11、_vt.消费；消耗12、_adj.温和的；温柔的13、_vi.照顾；趋向&vt.照顾；护理14、_vt.拥护；提倡；主张重点短语：1、_同意；订阅2、_发生；造成3、_大量的 4、_与相比5、_导致6、_反对7、_继续8、_涨价；上涨9、_代表10、_大体上；基本上探究案Period2Re
3、adingTask1Skimming(1)Whowrotethemagazinearticle？Whatisthenameofthemagazine?_(2)Whatarethenamesofthethreescientistsmentionedinthearticle？Dotheyagreewithoneanother?(3).Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?_Task2.Scanning(1).Howmuchdidthetemperatureriseinthe1900s?A.OnedegreeFahre
4、nheitB.OneCelsiusC.TwodegreesD.ThirtydegreeCelsius(2).Whatcausesthetemperatureoftheearthtoincrease?A.Cuttingtrees B.WastingthefarmlandC.RunningoutoftheriverwaterD.Burningfossilfuels(3).Whoaccuratelymeasuredtheamountofcarbondioxideintheatmospherefrom1957to1997?A.Dr.JaniceFoster. B.Fahrenheit.C.Charle
5、sKeelingD.GeorgeHambley(4).GeorgeHambleybelievesthatmorecarbondioxideisactually_.A.abadthingB.adangerousthing.C.acomparativethingD.apositivething(5).Whatisthemainideaofthispassage?A.Globalwarming.B.Floodphenomenon.C.Makingmethane.D.MakinggreenhousesTask3CarefulreadingReadthepassagecarefullyandjudgew
6、hetherthestatementsaretrue(T)orfalse(F)JaniceFosterbelievesthatglobalwarmingiscausedbyburningfossilfuels.()Naturalgasisagreenhousegas.()Carbondioxideisabyproductofburningfossilfuels.()PeopleacceptCharlesKeelingsdatabecausehetookaccuratemeasurements.()Floodingcouldbeoneoftheeffectsoffutureglobalwarmi
7、ng.( GeorgeHambleybelievesscientistsarejustguessingabouttheeffectsofglobalwarming.()GeorgeHambleyisworriedabouttheeffectsofcarbondioxideonplantgrowth.()Itisclearwhattheeffectsofglobalwarmingwillbe.()Task4Structureanalyzingmatch the part with main ideaPart1AItsuptoreaderstothinkanddecidewhetherpeople
8、shoulddosomethingaboutglobalwarmingornot.Part2BToillustratehowglobalwarmingcomesabout. Part3CTointroduceadebateovertheissueofglobalwarming.Part4DTolisttwodifferentattitudesamong scientiststowards globalwarming.Task5Post-reading.Theearthisbecomingwarmeranditishumanactivity_1hascausedthisglobalwarming
9、.Allscientists_2totheviewthattheincreaseintheearthstemperatureis_3totheburningoffossilfuels.Somebyproductsofthisprocess,especiallycarbondioxide,arecalledgreenhousegases.Somesmallamountsofgasesintheatmosphere_4heatfromthesunandthereforewarmtheearth.Soweneedthosegases.However,theproblembeginswhenweadd
10、huge_5ofextracarbondioxideintotheatmosphere.Itcausedtheglobaltemperatureto_6up.Ascientist_7CharlesKeelingmadeaccuratemeasurementsoftheamountofcarbondioxideintheatmosphere.Buthowhighwillthetemperature_8go?_9ifwestartreducingtheamountofcarbondioxideandothergreenhousegases,theclimateisgoingto_10onwarmi
11、ngfordecadesorcenturies.Nooneknowstheeffectsofglobalwarming. Period3GrammarI.句式讲解1.强调句型的基本结构形式Itis/was+被强调部分+that+句子的其余部分当被强调部分是人时that也可以换成who。原句：ProfessorLiuteachesusEnglishthisyear.强调主语：ItisProfessorLiuwhoteachesusEnglishthisyear.强调宾语：ItisEnglishthatProfessorLiuteachesusthisyear.强调状语:Itisthisyeart
12、hatProfessorLiuteachesusEnglish.2.强调句型的特点去掉Itis(was)及that(who)后，在不添词、不减词后，剩下的部分能组成一个完整的句子。这也是判断一个句子是否是强调句型的依据。3.强调句型的时态如果原句中谓语动词使用的是现在或将来时间范畴的时态（一般现在时、现在进行时、现在完成/现在完成进行时、一般将来时、将来进行时、将来完成时等），用_。如果原句中谓语动词为过去时间范畴的时态（一般过去时、过去进行时、过去完成时、过去将来时等），则用_。4.强调句型的一般疑问句式Is/Wasit+被强调部分+that+句子的其余部分。_.是刘教授今年教我们英语吗?（
13、强调句5.强调句型的特殊疑问句式特殊疑问句+is/wasit+被强调部分+that+句子的其余部分。_.今年教我们英语的是谁？_.刘教授今年是教我们什么的？6.notuntil句型的强调句型当被强调的是notuntil句型时，应将not置于until之前，主句由否定句改为肯定句。如：Hedidnttleaveuntil11oclock.他直到11点才离开。_.（强调notuntil时间状语） 训练案 A.对划线部分进行强调。(1)Thegreenhouseeffectgivestheearthssurfacetheaveragetemperatureof15._.(2)Intheyearsah
14、ead,theleveloftheseacouldrisebyseveralmetersbecauseofglobalwarming._.(3)Inthefutureouterspacemightprovideuswithnewenergysources._B.单项选择。1.Itwasthisvillage_Iwasbroughtup.A.whereB.thatC.onwhichD.which2.Itwasinthisvillage_Iwasboughtup.A.whereB.thatC.onwhichD.which3.Canitbeinthedrawer_youputyourpassport
15、?A.whereB.inwhichC.thereD.that4.ItwasJuly1,1997_sawthereturnofHongKongtothemotherland.A.thatB.whenC.whichD.inwhich5.Itistwoyears_Ijoinedthearmy.A.beforeB.sinceC.thatD.after6.Itwastwoyears_Ijoinedthearmy.A.beforeB.sinceC.thatD.after7.Itwasnotuntil1920_regularradiobroadcastbegan.A.whileB.whichC.thatD.
16、since8._isthefactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It9.Itwasabout600yearsago_firstclockwithafaceandanhourhandwasmade.A.thatB.untilC.beforeD.when10.Ihate_whenpeopletalkwiththeirmouthsfull.A.itB.thatC.theseD.themEvaluation习学案(10分)自学任务(10分)合作学习(10分)展示交流(10分)自我评价（2
17、5分）加分学生评价总分 (备注:好9-10分较好8-7分一般6-43-1分)记分采用自我评分,以诚信为原则,希望大家能得出最客观的评价.请小组长把每位同学的得分相加并除以平均分得出本组最后得分,成绩交给科代表。HomeworkAskthestudentstomakeaposterfortheirschoolthattellsstudentsvariouswaystheycanreducetheamountofcarbondioxideintheair.Tellstudentstogivetheposteraheadingthatwillbeeye catchingandwillmakeotherswanttoreadit.
