Unit7 Section A 1a-1c 课件-人教版八年级英语下册

Unit7What’sthehighestmountainintheworld?SectionA1a-1c1Leadin1,Whichisthehighestmountainintheworld?2.Whichisthelongestriverintheworld?3.WhichisthelongestriverinAsia?QomolangmatheNiletheChangjiangRiverQomolangmaQomolangmarunsalongtheborderbetweenChinaandNepal.Itiscoveredwithsnowalltheyearround.It’s8844.43metershigh,thehighestintheworld.Whichisthehighestmountainintheworld?theSahara

TheSahara

isthebiggestdesertintheworld.ItislocatedinthenorthernAfrica.Itsclimateconditionsareverybadandisoneoftheearth'smostunsuitableforbiologicalsurvival.

Whichisthebiggestdesertintheworld?theNile

TheNile

isthelongestriverintheworld.It’smorethan6,671kilometerslong.Itrunsthrough9countries.ItrunsintotheMediterraneanSea(地中海)intheend.

Whichisthelongestriverintheworld?theCaspianSea

TheCaspianSea(里海)

isthebiggestinland

lakeintheworld.ItliesintheborderbetweenAsiaandEurope.Whichisthebiggestinlandlakeintheworld?Objectives1.Tolearnnewwords:square,meter,deep,desert,2.Tolearntotalkaboutgeographyandnature(了解地理自然)3.Tolearntoreadlargenumbers（大数字）4.Tolearntocomparefacts（学会比较）

Self-learning1.Self-learnthenewwordsonpage492.Haveacheck.squaremeterdeepdesertn.

平方；正方形n.

米；公尺adj.

深的；纵深的n.

沙漠1.复习1—100以内的所有数字。2.掌握百、千、万、十万、百万的表达法。1、1-19的基数词one1two2three3four4five5six6seven7eight8nine9ten10Exploration2)三位数以上的数，从个位往前数，每三位数加一个逗号，从后往前数的第一个逗号代表thousand,第二个逗号代表million,第三个逗号是billion，注意这几个词不能用复数形式，后也不能加and。例如：

2,648twothousand,sixhundredandforty-eight16,250,064sixteenmillion,twohundredandfiftythousand,sixty-four220hundred百thousand千million百万billion十亿100,076,600,1:112:(记住每个单词)

2:1319:-teen(thir-,fif-,eigh-)3:2090:-ty(twen-,thir-,for-,fif-,eigh-)4:2199:十位_个位5:100,200,...900:_______hundred

6:101999:_______hundredand

__个位十位___个位7:多位数:______billion(十亿),______million(百万),_____thousand,______hundredand个位十位___个位__1aMatchthefactsyouknow.Qomolangmaabout9,600,000squarekilometersinsizeTheSahara1,025metersdeepTheCaspianSea6,671kilometerslongTheNile8,844.43metershigh1bListenandcompletethesentences.1.Qomolangmais_________thananyothermountainintheworld.2.TheSaharais__________desertintheworld.3.TheCaspianSeais___________ofallthesaltlakes.4.TheNileis_________riverintheworld.higherthebiggestthedeepestthelongest听力原文“the+序数词+最高级+单数名词+in…”

表示“是……中的第几……”“比较级+thananyother+名词+其他”

表示“比其他任何一个……都……”注：该结构可与“the+最高级+其他”相互转换形容词最高级结构:the+最高级+其他Usetheinformationin1btomakeconversations.1cA:Whatisthehighestmountainintheworld?B:Qomolangma.A:Howhighisit?B:Itis8844,43metershigh.TheSahara,9600000,big/insizeTheCaspianSea,1025,deepTheNile,6671,long1.good

2.comfortable3.big4.happy5.cheap6.many7.difficult8.littlebetter

bestmore～

most～bigger

biggesthappier

happiestcheaper

cheapestmore

mostmore～

most～less

least一写出下列单词的比较级和最高级Exercise1.Lilygetsup______(early)thanLucy.2.Whichgoes__________(slowly),TomorJim?3.Thisbookis_______________(interesting)thanthatone.earliermoreslowlymoreinteresting二根据所给词的适当形式填空4.Sheworks________________(careful)inherschool.5.Whogoestobed_________(late)Jim,TomorJack?6.Ithinkturkeyis________________(delicious)ofall.themostcarefullylatestthemostdeliciousSummaryImprovetheskillsofSs’

listen