英语人教版八年级下册Unit 7 SectionA 1a-1c.ppt

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1、Unit7What'sthehighestmountainintheworld?（sectionA1a-1c）Canyouanwsermetwoquestions?WhatisthehighestmountaininChina?WhatisthelongestriverinChina?QomolangmaisthehighestmountaininChina.TheYangtzeRiveristhelongestriverinChina.Doyouknowwhatthehighestmountainisintheworld?Doyouk

2、nowwhatthelongestriverisintheworld?Qomolangmaisthehighestmountainintheworld.TheNileisthelongestriverinChina.Doyouwanttoknowanythingelse?Let'sbeginourclass!Thereisariverinthedesert.Thedesertis200squarekilometersinsize.Theriveris0.5meterdeep.Newwords:desert沙漠deep深的meter米sq

3、uare平方（不可数名词）、广场（可数名词）、正方形（可数名词）9,600,0001,0256,6718,844.43Canyoureadthenumbers？ninemillionsixhundredthousandonethousandandtwenty-fivesixthousandsixhundredandseventy-oneeightthousandeighthundredandforty-fourpointfourthreeDoyouknowtheseplaces?QomolangmaQomolangmaisthehigh

4、estmountainintheworld.It’s8844.43metershigh.TheNileisthelongestriverofalltherivers.It’s6,671-kilometer-long.theNiletheCaspianSeaTheCaspianSeaisbiggerthananyotherlakeintheworld.Itis1,025metersdeep.TheSaharaisbiggerthantheotherdesertsintheworld.Itisabout9,600,000squarekilo

5、metersinsize.theSaharaWhichisthehighestmountainintheworld?Whichisthelongestriverintheworld?Talkaboutthesepicturesinpairs.1aMatchthefactsyouknow.基数词+单位词+形容词表示长宽高Explaination1.这堵墙2米宽。Thewallis2meterswide.2.这条河100千米长。Theriveris100kilometerslong.Thehouseis2metersinheight.The

6、squareis1000squaremetersinsize.基数词+单位词+in+名词(size,length,width,height,depth)表示长宽高。1.这所房子2米高。2.这个广场1000平方米。复合形容词即：基数词-单位词-形容词来表示长宽高，常用作定语。Heisa10-year-oldboy.Itis5-meter-deep.1.他是一个10岁的男孩。2.它5米深。Heistallerthananyotherboyinmyclass.Heistallerthantheotherboysinmyclass.Heisth

7、etalleststudentofallthestudentsinmyclass.找规律，总结出表示最高级的三种结构。三种表示最高级的结构：1.比较级+than+anyother+可数名词单数表示最高级。2.比较级+than+theother+可数名词复数表示最高级。3.the最高级+可数名词单数+in/of短语表示最高级。长江是中国最长的河流。TheYangtzeRiveristhelongestriverinChina.TheYangtzeRiverislongerthananyotherriverinChina.TheYangtz

8、eRiverislongerthantheotherriversinChina.1bListenandcompletethesentences.1.Qomolangmais______thananyothe