Unit4SectionA（GrammarFocus）课件人教版八年级英语下册

Unit4SectionA(GrammarFocus)TheWondersofNatureLearningObjectivesBytheendofthislesson,wewillbeableto：1.identifycomparativeandsuperlativedegreesandnumbers;2.masterthevariationrulesofcomparativeandsuperlativedegrees;3.consolidatecomparativeandsuperlativedegreesandthespellingofnumbersindiverseexercises.

NatureExplorerLet’sexplorethem!Guessandmatch8,848.86344,0006,40093,200,000,0006,671MountEverestis8,848metershigh.TheSaharaDesertisabout9.32millionsquarekilometersinarea.（简化后，方便学生对应图里“Area:_____m²”，若图里单位是km²

更合理，这里按简化教学习惯

）TheNileRiverisabout6,650kilometerslong.TheGreatBarrierReefisapproximately0.344millionsquarekilometersincoverage.TheAmazonRainforestisabout5.5millionsquarekilometersincoverage.TheAmazonRiverisabout6,400kilometerslong.ReadandsaythenumbersMountEverestis8,848metershigh.TheSaharaDesertisabout9320000squarekilometersinarea.TheNileRiverisabout6,650kilometerslong.TheGreatBarrierReefisapproximately344000

squarekilometersincoverage.TheAmazonRainforestis6,000,000squarekilometresinsize.TheAmazonRiverisabout6,400kilometreslong.eightthousandeighthundredandfortyninemillionthreehundredandtwentythousandsixthousandsixhundredandfiftythreehundredandforty-fourthousandsixmillionsixthousandfourhundredTheAmazonRiver(6,400km)islongerthantheMississippiRiver(3,770km).Comparinggame6,400km3,770kmTheAmazonRiver(6,400km)islongerthantheMississippiRiver(3,770km).Comparative:比较级Superlative A+be+the+adjective/adverb+-est ComparinggameMountKilimanjaroisthehighestmountaininAfrica.TheGreatBarrierReefisoneofthemostmagnificentnaturalwondersintheworld.Superlative:最高级Watchandfindtherule形容词和副词的比较级的变化规律：情况规则例子

一般情况下以e结尾直接加-er直接加-rtalltaller重读闭音节结尾双写末尾字母加-ersafesaferbigbigger“辅音字母+y”结尾变y为i,再加-erhappyhappier部分双音节词和多音节词在前面加morebeautifulmorebeautiful形容词和副词的最高级的变化规律：情况规则例子

一般情况下以e结尾直接加-est直接加-sttalltallest以重读闭音节结尾双写末尾字母加-estsafesafestbigbiggest“辅音字母+y”结尾变y为i,再加-esthappyhappiest部分双音节词和多音节词在前面加mostbeautifulmostbeautiful形容词和副词的比较级和最高级的不规则变化：原级比较级最高级good/wellbetterbestbad/badly/illworseworstmany/muchmoremostlittlelessleastfarfartherfarthestfurtherfurthestoldolder/elderoldest／eldestReadinggame:Whocanreadfastest?4aReadthesentences.Circletheadjectiveswhichcomparethings.Underlinetheadverbswhichcompareactions.Whatisthebiggestdesertintheworld?

ItistheSaharaDesert.

Howbigisit?

Itisabout9,000,000squarekilometresinsize.

Whereisthedeepestpointintheocean?

ItisintheMarianaTrench.

Howdeepisit?

Itisabout11,000metresdeep.

Somedeep-seaanimalsareblind,buttheycan“see”aswellasothers.MountQomolangmaisoneofthegreatestwondersoftheworld,anditisstillgrowingtaller.

TheYangtzeRivertravelsthefarthestinChinaandisabout6,300kilometreslong.4bWriteorspelloutthenumbers.1.MountKilimanjarois________

(fivethousand,eighthundredand

ninety-five)metreshigh.2.___________(twenty-fivethousand,sevenhundredandsixty-eight)cubic

metresofwaterpoursdownIngaFallseachsecond.3.TheEastAfricanRiftValleyisabout4,000(_____________)

mileslong.4.TheTaklimakanDeserthasatotalareaofabout337,000(_____________________________________)squarekilometres.5,89525,768fourthousandthreehundredandthirty-seventhousand4cCompletethepassagewiththecorrectformsofthewordsinthebox.

Onewordisusedmorethanonce.MyfriendsandIvisitedVictoriaFallsin

Africalastyear.Visitingoneoftheworld's________________

waterfallswasamagical

experience.Aswewent________________falls,thenoiseofthewaterslowlygrew

________________and

________________.Then,right

beforeoureyes,thewaterfallappeared.Itwentonforas

________________

as

theeyecouldsee.Later,wesatinaspecialpoolatthetopofthefalls.There,

wefeltthewaterrushpastusandbecomeapartofthewaterfall.Itwasthe

________________

butalsothe

________________

experienceofourtrip!4cCompletethepassagewiththecorrectformsofthewordsinthebox.

MyfriendsandIvisitedVictoriaFallsin

Africalastyear.Visitingoneoftheworld's________waterfallswasamagical

experience.Aswewent________tothefalls,thenoiseofthewaterslowlygrew

_______and

louder.Then,right

beforeoureyes,thewaterfallappeared.Itwentonforas

_____

as

theeyecouldsee.Later,wesatinaspecialpoolatthetopofthefalls.There,

wefeltthewaterrushpastusandbecomeapartofthewaterfall.Itwasthe

scariest

butalsothe

______________

experienceofourtrip!largeamazingfarcloseloudlargestcloserlouderfarmostamazing“oneof+the+形容词最高级+可数名词复数”是固定结构，表示“……之一”gocloser表示“走得更近”“比较级+and+比较级”表示“越来越……”，这里说明水的声音变得“越来越大”“asfarastheeyecouldsee”是固定表达，意为“就肉眼所能看到的范围；一望无际”在瀑布顶端的水池感受水流，那种体验是“最可怕的”，也是旅行中“最令人惊叹的”经历

4dWritesomequestionstocompareplaces.Thenaskapartneryourquestions.·Whatisthehighest..?·Whichparkisbigger,…or..?4dWritesomequestionstocompareplaces.Thenaskapartneryourquestions.Whatisthehighest...?Whichparkisbigger,…or...?...4cReadthepassageaboutmanagingstress.Thencompletethesentences.Therearemanythingsyoucandowhenyoufeelstressed.First,youcan

takeabreakfromwhatyouaredoing.Thiswillhelpyouclearyourmind.

Youcanlistentomusicorgoforawalk.Next,shareyourproblemswith

someoneyoutrustinsteadofshuttingyourselfaway.Thepersonmightnot

haveanyadviceforyou,buttalkingaboutyourproblemscanhelpyoufeel

better.Lastly,remembertotakecareofyourself.Eathealthyfood,exercise,

andgetenoughsleep.Thesethrethingsalonearegreatforreducingstress!1.If_,youshouldtakeabreakfromwhatyouaredoing.2.Youcantalktoapersonyoutrust,although__.3.Youmightnotfeelbetteruntil___.4.Youshouldeathealthyfood,getplentyofsleep,andexercisesothat_!R:Let’sdiscussrainforests—Amazonvs.Congo!Whichhasamorediverseecosystem?E:TheAmazonisthelargestandmostdiverse.IthasmorespeciesofplantsandanimalsthantheCongo.Forexample,therearemoretypesofmonkeysintheAmazon!R:WhyistheAmazon’secosystemsospecial?E:Itssize(6millionsquarekilometers)meansitcansupportmorecomplexfoodchains.It’smoreimportantforearth’sclimatethanmanysmallerforests.R:IsvisitingtheAmazonamorepopulartripthantheCongoRainforest?E:Yes,theAmazonismorewell-known,somoretouristsvisit.ButtheCongoislessexplored,soitfeelsmorewildandmysterious—maybemoreexcitingforadventurers!SampleMakeanewdialogueandrole-playit.ShowTimeYoucanuse-er-estmore...most...moreandmorethemore,themore...Presentyourinterview.Reportyourreportinclass.Hello,class.Thisisourinterview.Thisis_______________________________________._____________________________________________.

_____________________________________________._____________________________________________.Lovethenature,lovetheworld.CheckyourpresentationPresentyourinterviewtotheclass.languagecorrectform(形式正确)accuratemeaning(意义精确)properuse(使用恰当)questiondesigncreativity(创意)performanceconfidence(自信)OK

Good

ExcellentNature'swonders,bigorsmall,allwhisperthesamemagic—letourwordsholdthatbeautyclose.1.

Sanyais________(hot)thanShanghai.2.

Theelephantis

_________(heavy)thanthegiraffe.3.

Sheis