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1、教学目标：1语言目标：掌握本节重点词汇及能理解用比较级和最高级谈论各之最。2技能目标：能听懂和谈论有关地理和自然的话题。3情感目标：培养学生热爱大自然，热爱祖国的大好河山，保护环境的意识。教学重点：让学生在文中理解并牢记本单元的短语及以下句子：What’sthehighestmountainintheworld?HowlongisQomolangma?It’s8,844.43metershigh.It’shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallth
2、esaltlake.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It’smucholderthantheUS.教学难点：掌握形容词和副词的比较级和最高级变化规则和用法，体会并学习如何对物体之间进行对比。Step1Presentation1.Newwords:squaren.平方metern.米deepadj.深的desertn.沙漠populationn.人口populationn.人口Asian.亚洲tourv.n.旅行touristn.旅行者walln.墙amazingadj.令人大为惊奇的ancient
3、adj.古代的wideadj.宽的；宽阔和2.Letthestudentslookatsomepicturesandinformationofthehighestmountain,thelongestriver,thebiggestriver,thebiggestlakeandthebiggestdesertintheworld.Step2Warmingup1.Lookatthephotosandtalkaboutthem,“Howbig/high/long/bigis…?”and“It’s…meters/kilometers/cmbig/high/long/big”.2.Lookatthe
4、sephotosandaskthestudentstomakesomedialogues:e.g.A:HowhighisQomolangma?B:It’s8,844.43metershigh.Step31aMatchthefactsyouknow.Qomolangmaabout9,600,000squarekilometersinsizeTheSahara1,025metersdeepTheCaspianSea6,671kilometerslongTheNile8,844.43metershighStep4Practiceinpairsusingtheinformationin1a,then
5、asktwopairstoactitout.1.A:Whichisthehighestmountainintheworld?B:It’sQomolangma.2.A:HowhighisQomolangma?B:It’s8,844.43metershigh.Step5Listening1.1bListenandcompletethesentences.2.2aListenandnumberthefacts(1-4)intheorderyouhearthem.2bListenagainandfillintheblanksin2awiththenumbersinthebox.Step6Practi
6、ce2cHelpthestudentstomakeconversationsinpairs.ExamplesA:DidyouknowthatChinaisoneoftheoldestcountriesintheworld?B:Yes,Idid.It’smucholderthanmycountry.Step72d1.Readtheconversationandanswerthequestions:1)Whichisthebiggestman-madeobjectintheworld？2)WhichisthemostfamouspartoftheMingGreatWall?2.Role-play
7、theconversation.Step8Languagepointsandsummary1.8,844.43metershigh.8,844.43米高…metershigh(long,wide…)……米高（长,宽……)。英语表示“有多长（宽，高……）”时，一般将数词和数量单位放在表示长宽高的形容词前作状语。e.g.Theropeis2meterslong.2.Chinahasthebiggestpopula
