英语人教版八年级下册unit 7 period 1.ppt

Unit7Whatsthehighestmountainintheworld?,1,1a2c,Doyouknowtheseinterestplaces?,Qomolangma,QomolangmarunsalongtheborderbetweenChinaandNepal.Itiscoveredwithsnowalltheyearround.,tumul:m,Thehighestmountainintheworld.,Howhighisit?,Itis8,844.43metershigh.,Qomolangma,thousand,hundredand,TheNileisthelongestriverintheworld.Itsmorethan6600kilometerslong.Itrunsthrough9countries,itsoneofthelargestriverflowsthroughtheinternationalstatesintheworldandrunsintotheMediterraneanSea(地中海)intheend.,TheNile,Thelongestriver,TheNile,DoyouknowthattheNileisthelongestriverintheworld?,Yes.,Itis6,671kilometerslong.,Howlongisit?,TheCaspianSea,TheCaspianSeaisthebiggestlakeintheworld.ItliesintheborderbetweenAsiaandEurope.,kspin,Theworldsdeepestsaltlake,TheCaspianSea,Howdeepisit?,Itis1,025metersdeep.,TheSaharaisthebiggestdesertintheworld.ItislocatedinthenorthernAfrica,climateconditionsareverybad,isoneoftheearthsmostnotsuitableforbiologicalsurvival.,TheSahara,sh:r,thebiggestdesertintheworld,Itisabout9,600,000squarekilometers(平方公里)insize.,Sahara,desert沙漠,million,Howbigisit?,Matchthefactsyouknow.,1a,QomolangmaTheSaharaTheCaspianSeaTheNile,about9,600,000squarekilometersinsize1,025metersdeep6,671kilometerslong8,844.43metershigh,point,Listenandcompletethesentences.,Qomolangmais_thananyothermountainintheworld.TheSaharais_desertintheworld.TheCaspianSeais_ofallthesaltlakes.TheNileis_riverintheworld.,1b,higher,thebiggest,thedeepest,thelongest,A:Whatisthehighest/thebiggest/thedeepest/heworld?B:.A:Howhigh/big/deep/longisit?B:Itis,1c,Pairwork,Usetheinformationin1aand1btomakeconversations.,HowaboutChina?,WhatisthelongestriverinChina?WhatisthesecondlongestriverinChina?,ItsYangtzejtsRiver.(长江),ItsYellowRiver.,TheYangtzejtsiRiveristhethirdlongestriverintheworld,thefirstAsianrivers.Its6211.31kilometerslong.TheYangtzeRiverBasin,east-westwidthof3219kilometers,about966kilometerswidenorth-south,passingthrough11provinces.ItrunsintotheEastSeainShanghaifinally.,TheYangtzeRiver,_TheYangtzeRiverisabout_kilometerslongandtheYellowRiveris_kilometerslong._Chinahasthebiggestpopulationintheworld.ItsalotbiggerthanthepopulationoftheUS._Chinaisover_yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven_yearsold._ChinaisalmostasbigastheUS,anditisthebiggestcountryinAsia.,Listenagainandfillintheblanksin2awiththenumbersinthebox.,2b,6,300,5,464,5,000,300,6,3005,0005,464300,Mike:Hi,ImMike.ImfromtheUnitedStates.Boy:Welcometoourclass,Mike.Werehappytomeetyou.Mike:CanyoutellmeabitmoreaboutChina?Girl:Sure!DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Itsover5000yearsold.Mike:Yes,Idid.Itsmucholderthanmycountry-infact,theUnitedStatesisoneoftheyoungestcountriesintheworld.Itsnoteven300yearsold.,Boy:AndChinahasthebiggestpopulation,too.ItsaLotbiggerthanthepopulationoftheUnitedStates.Mike:ButChinaisaboutthesamesizeastheUS,right?Girl:Yes,anditsthebiggestcountryinAsia.Wealsohavesomefamousrivers.TheYangtzeRiveristhelongestriverinAsia.Itsabout6300kilometerslong.Mike:Wow!Ididntknowthat.IthoughtheYellowRiverwaslonger.Boy:No,theYellowRiveris5464kilometerslong.ButbothriversareveryimportanttoChina.,A:DidyouknowthatChinaisoneoftheoldestcountriesintheworld?B:Yes,Idid.itsmucholderthanmycountry.A:DidyouknowthatYangtzeRiveristhelongestriverinChina?B:Yes,Idid.Its6,300meterslong.B:Wow!Thatslong!,Practice,TheYangtzeRiverisabout6,300kilometerslongandtheYellowRiveris5,464kilometerslong.观察句子中的蓝体部分构成有什么特点？,观察与思考,当我们描述长宽高等物体的形状时，常用到_,数字+kilometer(s)/meter(s)/+long/deep/high/,ItsalotbiggerthanthepopulationoftheUS.IthasamuchlongerhistorythantheUS.,观察与思考,此处alot,much起什么作用？还有其他类似的词吗？,abit/alittle/alot/agreatdeal/no/much/far/even,口诀：四个小a(abit/alittle/alot/agreatdeal)没有(no)马骑(much)，甚至(even)不能走远(far),观察与思考,说出下列单词的比较级和最高级：,long_deep_old_heavy_high_big_careful_interesting_,longerlongestdeeperdeepestolder/elderoldest/eldestheavierheaviesthigherhighestbiggerbiggestmorecarefulmostcarefulmoreinterestingmostinteresting,Grammar语法,形容词比较级/最高级的变化：规则的：cheap-cheaper-cheapestbigbigger-