Unit7 Section A 1a-1c 課件-人教版八年級英語下冊

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（大數(shù)字）4.Tolearntocomparefacts（學(xué)會比較）

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

平方；正方形n.

米；公尺adj.

深的；縱深的n.

沙漠1.復(fù)習(xí)1—100以內(nèi)的所有數(shù)字。2.掌握百、千、萬、十萬、百萬的表達(dá)法。1、1-19的基數(shù)詞one1two2three3four4five5six6seven7eight8nine9ten10Exploration2)三位數(shù)以上的數(shù)，從個(gè)位往前數(shù)，每三位數(shù)加一個(gè)逗號，從后往前數(shù)的第一個(gè)逗號代表thousand,第二個(gè)逗號代表million,第三個(gè)逗號是billion，注意這幾個(gè)詞不能用復(fù)數(shù)形式，后也不能加and。例如：

2,648twothousand,sixhundredandforty-eight16,250,064sixteenmillion,twohundredandfiftythousand,sixty-four220hundred百thousand千million百萬billion十億100,076,600,1:112:(記住每個(gè)單詞)

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

6:101999:_______hundredand

__個(gè)位十位___個(gè)位7:多位數(shù):______billion(十億),______million(百萬),_____thousand,______hundredand個(gè)位十位___個(gè)位__1aMatchthefactsyouknow.Qomolangmaabout9,600,000squarekilometersinsizeTheSahara1,025metersdeepTheCaspianSea6,671kilometerslongTheNile8,844.43metershigh1bListenandcompletethesentences.1.Qomolangmais_________thananyothermountainintheworld.2.TheSaharais__________desertintheworld.3.TheCaspianSeais___________ofallthesaltlakes.4.TheNileis_________riverintheworld.higherthebiggestthedeepestthelongest聽力原文“the+序數(shù)詞+最高級+單數(shù)名詞+in…”

表示“是……中的第幾……”“比較級+thananyother+名詞+其他”

表示“比其他任何一個(gè)……都……”注：該結(jié)構(gòu)可與“the+最高級+其他”相互轉(zhuǎn)換形容詞最高級結(jié)構(gòu):the+最高級+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一寫出下列單詞的比較級和最高級Exercise1.Lilygetsup______(early)thanLucy.2.Whichgoes__________(slowly),TomorJim?3.Thisbookis_______________(interesting)thanthatone.earliermoreslowlymoreinteresting二根據(jù)所給詞的適當(dāng)形式填空4.Sheworks________________(careful)inherschool.5.Whogoestobed_________(late)Jim,TomorJack?6.Ithinkturkeyis________________(delicious)ofall.themostcarefullylatestthemostdeliciousSummaryImprovetheskillsofSs’

listen