英语人教版八年级下册unit7.ppt

Whatsthehighestmountainintheworld?,Whichisthehighestmountainintheworld?Whichisthelongestriverintheworld?,Doyouknowthis?,Qomolangma,QomolangmarunsalongtheborderbetweenChinaandNepal.Itiscoveredwithsnowalltheyearround.Its8844.43metershigh,thehighestintheworld.Its26kilometerslong.,theSahara,TheSaharaisthebiggestdesertintheworld.ItislocatedinthenorthernAfrica.Itsclimateconditionsareverybadandisoneoftheearthsmostunsuitableforbiologicalsurvival.,theCaspianSea,TheCaspianSea(里海)isthebiggestinlandlakeintheworld.Themaxdepthis1,025m(inthesouthernpart).ItliesintheborderbetweenAsiaandEurope.,theNile,TheNileisthelongestriverintheworld.Itsmorethan6,600kilometerslong.Itrunsthrough9countries.ItsoneofthelargestriverflowingthroughtheinternationalstatesintheworldandrunsintotheMediterraneanSea(地中海)intheend.,theYangtzeRiver,TheYangtzeRiveristhethirdlongestriverintheworld,andthefirstAsianriver.Its6211.31kilometerslong.TheYangtzeRiverBasin,east-westwidthof3,219kilometers,about966kilometerswidenorth-south,passingthrough11provinces.ItrunsintotheEastSeainShanghaifinally.,Learningaims,知识目标:1.掌握单词和短语：square,meter,deep,desert,population,Asia,feelfree等；2.掌握英语中表示计量的方法；3.掌握形容词比较级和最高级的用法。能力目标：用数字讨论地理与自然；熟练运用形容词比较级和最高级。,Readthewordsandexpressionsloudly.,QomolangmatheNiletheCaspianSeatheSaharatheYangtzeRivertheYellowRivertheMingDynastytheMingGreatWall,珠穆朗玛峰尼罗河里海(世界最大的咸水湖)撒哈拉沙漠长江黄河明朝明长城,squaremeterdeepdesertpopulationAsiafeelfreetour,n.平方；正方形n.米；公尺adj.深的；纵深的n.沙漠n.人口；人口数量n.亚洲(可以)随便(做某事)n.v.旅行；旅游,touristwallamazingancientprotectwideasfarasIknow,n.旅行者；观光者n.墙adj.令人大为惊奇的;令人惊喜(或惊叹)的adj.古代的；古老的v.保护；防护adj.宽的；宽阔的就我所知,1a,Matchthefactsyouknow.,8,844.43metershigh.8,844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。Thewallis1.7meterswide.,Explanation,A:HowhighisQomolangma?B:Its8,844.43metershigh.,Practice,Thebiggestdesertintheworldisabout9,600,000squarekilometersinsize.,HowbigistheSahara?Itsabout9,600,000squarekilometersinsize.,insize意为“在尺寸上；在大小方面”Thepairsofshoesaredifferentinsize.这几双鞋子尺码不同。英语中表示长、宽、高等，可用“基数词+meter(s)/inch(es)/foot(feet).+in+名词（lenth,width,height等）Heissixfeetinheight.也可如下表达：基数词+meter(s)/inch(es)/foot(feet)+形容词（long,wide,high等）Theriveris5,200meterslong.Thewallisabout23metershigh.,1b,Listenandcompletethesentences.,1.Qomolangmais_thananyothermountainintheworld.2.TheSaharais_desertintheworld.3.TheCaspianSeais_ofallthesaltlakes.4.TheNileis_riverintheworld.,higher,thebiggest,thedeepest,thelongest,Usetheinformationin1btomakeconversations.,1c,A:Whatisthehighestmountainintheworld?B:Qomolangma.,Practiceinpairslikethis:A:Whatistheinthe?B:,Practice,Whatisthelongestriverintheworld?,TheNile.,Whatisthebiggestdesertintheworld?,TheSahara.,WhatisthelongestriverinAsia?,TheYangtzeRiver.,Makesentenceswiththefollowingadjectivestodescribethings.thehighestthelongestthedeepestthebiggest,Practice,SamplesIliveinthehighestbuildinginthecity.Meilihasthelongesthairintheclass.ThatswimmingpoolisthedeepestoneIveeverswamin.Wehavethebiggestfieldofallthehighschoolsintown.,6,3005,0005,464300,Practicereadingthefollowingfournumbers.,Whichisthebiggestnumber?Whichisthesmallestnumber?,朗读1a,2a,2c,2d，5分钟后完后完成自学检测题。,一、词性转换1.high(比较级)_2.deep(最高级)_3.big(最高级)_4.tour(表示人的名词)_5.popular(比较级)_6.famous(最高级)_二、完成句子，明确本课重点句型。7.撒哈拉沙漠是世界上最大的沙漠。TheSaharais_desertintheworld.8.中国拥有5000多年的历史。它比美国历史要长许多。China_over5,000years_.Ithasa_historythantheUS.9.珠穆朗玛峰比世界上其他任何一座山都要高。Qomolangmais_than_mountainintheworld.10.中国是世界上最古老的国家之一。Chinaisoneofthe_intheworld.11.尼罗河有6670千米长。TheNile_6,670kilometers_.,2a,Listenandnumberthefacts1-4intheorderyouhearthem.,_TheYangtzeRiverisabout_kilometerslongandtheYellowRiveris_kilometerslong._Chinahasthebiggestpopulationintheworld.ItsalotbiggerthanthepopulationoftheUS.,6,3005,0005,464300,4,2,_Chinaisover_yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven_yearsold._ChinaisalmostasbigastheUS,butitisthebiggestcountryinAsia.,1,3,Listenagainandfillintheblanksin2awithnumbersinthebox.,2b,_TheYangtzeRiverisabout_kilometerslongandtheYellowRiveris_kilometerslong._Chinahasthebiggestpopulationintheworld.ItsalotbiggerthanthepopulationoftheUS.,6,300,5,464,_Chinaisover_yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven_yearsold._ChinaisalmostasbigastheUS,butitisthebiggestcountryinAsia.,5,000,300,Makeconversationsusingtheinformationin2a.,2c,A:DidyouknowthatChinaisoneoftheoldestcountriesintheworld?B:Yes,Idid.Itsmucholderthanmycountry.,温馨提示：Didyouknow?是一般过去时态，问你过去是否知道。Doyouknow?是一般现在时态，问你目前是否知道。或者说，当你真正在提问时，问对方知不知道一件事情，用Doyouknow.?当你用疑问语气而真正想告诉对方一个事实，用Didyouknow.?,A:DidyouknowthatYangtzeRiveristhelongestriverinChina?B:Yes,Idid.Its6,300meterslong.A:Wow!Thatslong!,A:DidyouknowthatChinahasthebiggestpopulationintheworld?B:Yes,Idid.ItsalotbiggerthanthepopulationoftheUS.A:Wow!Thatsamazing!,2d,Role-playtheconversation.,中国的长城共有近一万公里，东起河北秦皇岛的山海关，西到嘉峪关，这是明代修筑长城的两个最大关口，北京境内的长城有600余公里，比较著名的有八达岭长城、金山岭长城、司马台长城、慕田峪长城、居庸关长城和箭扣长城等。,TheGreatWall,慕田峪长城,Whatistheconversationabout?HowlongistheMingGreatWall?,ItsaboutatourtotheMingGreatWall.,Itsabout8,850kilomoterslong.,feelfreethemostpopularquestiontalkabouttheMingDynastytheancientemperorsthemainreasonasfarasIknowtheMingGreatWall,Importantphrasesandsentences.,Howlongisthewall?Itsabout8,850kilometerslong.Thismakesitthelongestwallintheworld.Itsthemostfamouspart.,Makeadialogue,talkingaboutaplaceofinterest.Oneactsastheguideandtheotherthetourist.Use2dasanexample.,Pairwork,1.Chinahasthebiggestpopulationintheworld.,populationn.人口；人口数量Thepopulationofthiscityissixmillion这个城市的人口是600万。ThepopulationofChinaismuchlargerthanthatoftheUSA.中国的人口比美国的人口多很多。,Languagepoints,population作主语的时候，谓语动词通常用单数形式；当主语是表示“人口的百分之几、几分之几”时，谓语动词用复数形式。询问人口数量时要用“Whatsthepopulationof.?”提问，而不用howmany或howmuch等提问。表示人口“多”要用large或big；表示人口“少”要用small。,1).ThepopulationofShanghaiis_thanthatofGuiyang.A.smallerB.largerC.lessD.large2).-_isthepopulationofthetown?-Over20,000.Andathirdofthepopulation_workersofthecarfactory.A.What,areB.Howmany,areC.What,isD.Howmany,is,B,A,3).Whichcityhas_population,Beijing,GuiyangorXingyi?Xingyi,ofcourse.A.thelargestB.thesmallestC.themostD.theleast4).-_thepopulationofChina?-1.3billion.EveryoneknowsChinahasthe_populationintheworld.A.Whatare,mostB.Whatis,largestC.Howmanyare,mostD.Howmanyare,largest,B,B,2.FeelfreetoaskmeanythingontodaysGreatWalltour.,feelfree是英语口语中一个常用表达。feelfreetodosth.，让你无需拘束，只管按照自己的意愿去做某事。,A:CanIuseyourbathroom?我可以用一下你的卫生间吗？B:Yes,feelfree.可以，请随意。Iamnothungry.Feelfreetoeatmyapple.我不饿。你想吃我的苹果就吃吧。Feelfreetocontactmeifyoustillneedanyhelp.如果还需要帮忙，尽管联系我。,asfarasIknow是一个固定的表达方式，还可以说sofarasIknow，意思是“据我所知”。AsfarasIknow,Jacksgottwinsisters.就我所知，杰克有一对孪生姐妹。Theyrenotcomingtoday,sofarasIknow.他们今天不来了，就我所知是这样的。,2.AsfarasIknow,therearenoman-madeobjectsasbigasthis.,AsfarasIknow,hewillbeawayforthreemonths.据我所知,他将离开三个月。短语“asfaras”意为“就.而言”AsfarasIcansee,thatisntarealdog.,man-madesatellite人造卫星Nylonisaman-madefibre.尼龙是一种人造纤维。man-made是合成形容词，类似的与-made合成的形容词还有：ready-made(现成的；做好的),hand-made(手工的),homemade(自制的),tailor-made(量体定制的)等。,man-madeadj.人造的，人工的，合成的,Doyouknowhowtoreadthesenumbers?,8844.43meters,1,025metersdeep,6,600kilometerslong