Unit7What'sthehighestmountainintheworld？SectionAGrammarFocus-4c課件人教八年級英語下冊

Unit7What’sthehighestmountainintheworld?(SectionAGrammarFocus-4c)人版版八年級下冊Learningobjectives?

Learnthewordsandexpressions:

ocean,thePacificOcean.?Learntousenumberstodescribefacts.?Learntousecomparativesand

superlativeswithadjectivesandadverbs.RevisionCanyoutranslatethefollowingsentences?1.長江大約長6,300千米。TheYangtzeRiverisabout6,300kilometers

long.2.黃河長5,464千米。TheYellowRiveris

5,464kilometers

long.3.明長城大約有8,850千米長。TheMingGreatWallisabout8,850kilometers

long.Qomolangmais

8,848.86meters

highandsoisverydangeroustoclimb.4.珠穆朗瑪峰高8,848.86米，所以攀登起來很危險。TheYangtzeRiverisabout6300kilometers

long.TheYellowRiveris

5464kilometers

long.TheGreatWallinMingdynastyisabout8,850kilometers

long.Qomolangmais

8,844.43meters

highandsoisverydangeroustoclimb.Whatcanyougetfromthefoursentences?長、寬、高、深的表達法：基數(shù)詞+單位詞+形容詞（long,wide,high,deep等）。當基數(shù)詞大于1時，單位詞用復(fù)數(shù)形式。e.g.Thebasketballplayeris2meterstall.

Theriverisonly2meterswide/deep.

Themountainisabout2thousandmetershigh.

Theriverisabouttwokilometerslong.The

is

.2Nowpleasechangethesubjectstomakesentenceswiththenumber2GrammarFocusWhat’sthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?It’s8,848.86metershigh.It’shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It’smucholderthantheUS.Findthecomparativesandsuperlatives.此句型用比較級表達最高級含義Let'sstudymoresentencesandfindouttherules.1)It’salotbiggerthanthepopulationoftheUS.2)Chinaisover5,000yearsold.Ithasamuchlonger

historythantheUS.3)Qomolangmaishigherthan

anyothermountainintheworld.1)TheSaharaisthebiggestdesertintheworld.2)TheNileisthelongestriverintheworld.3)Chinahasthebiggestpopulationintheworld.4)ChinaisalmostasbigastheUS,anditisthebiggestcountryinAsia.5)Thismakesitthelongestwallintheworld.6)It’sthemostfamouspart.7)Oneoftheworld’smostdangeroussportsismountainclimbing,andoneofthemostpopularplacesforthisistheHimalayas.Let'sstudymoresentencesandfindouttherules.形容詞和副詞通常有三種級別：原級（Positiveform）：沒有比較含義，“……”；比較級（Comparativeform）：兩者間比較，表示“較…...”或“更……一些”；最高級（Superlativeform）：三者及三者以上比較，表示“最……”形容詞最高級前一般要加定冠詞the，副詞最高級前的the可以省略。語法歸納形容詞和副詞的比較級和最高級一、比較級和最高級的構(gòu)成1.規(guī)則變化單音節(jié)和部分雙音節(jié)詞多音節(jié)詞和部分雙音節(jié)詞一般在詞尾直接加er或-est以e結(jié)尾的，加-r或-st以“輔音字母+y”結(jié)尾的，改y為i加-er或-est重讀閉音節(jié)以一個輔音字母結(jié)尾的，雙寫這個輔音字母后加-er或-est在單詞前加more構(gòu)成比較級，加most構(gòu)成最高級long→longer→longestnice→nicer→nicestheavy→heavier→heaviestbig→bigger→biggestbeautiful→morebeautiful→mostbeautiful2.不規(guī)則變化原級比較級最高級good/wellbetterbestmany/muchmoremostbad/badlyworseworstlittlelessleastoldolder/elderoldest/eldestfarfarther/furtherfarthest/furthest1.“比較級+thananyother+可數(shù)名詞單數(shù)+其他”

=“比較級+thantheother+可數(shù)名詞復(fù)數(shù)”表示“比其他任何……

都……”,表示最高級含義，可與表示最高級的句子進行轉(zhuǎn)換。該結(jié)構(gòu)可與最高級結(jié)構(gòu)互換e.g.Thebagischeaperthananyotherbaginthestore.=Thebagischeaperthantheotherbagsinthestore.

=Thebagisthecheapestinthestore.二、比較級的用法2.“比較級+and+比較級”表示“越來越……”e.g.Theweatherisgettingwarmerandwarmer.3.“the+3.比較級,the+比較級”表示“越……，就越……”e.g.Themoreyoupractice,thebetteryou’llplaypipa.4.“the+比較級+ofthetwo”表示“兩者之中更……的那一個”e.g.Susanisthetallerofthetwogirls.5.“數(shù)詞+times+比較級+than”表示“……是……的幾倍”e.g.Theelephantweighstentimesmorethanthepanda.6.比較級前可加much,alot,abit,alittle,even,far等詞修飾。如：

Youmustworkmuchfaster.Youlookalothappierthanyoudidyesterday.Thisbookisevenmoreusefulthanthatone.7.比較級前還可加其他表示數(shù)量的詞。如：

Mysisteristenyearsyoungerthanme.Wereachedheretwodaysearlierthantheothers.三、最高級的用法1.（the+）最高級+in/of短語

該結(jié)構(gòu)意為“……中最……的”。Ithinkspringisthebesttimeofayear.Tomworks(the)hardestinClass3.2.

oneofthe+最高級+可數(shù)名詞復(fù)數(shù)+in/of短語該結(jié)構(gòu)意為“……中最……的……之一”。Hangzhouisoneofthemostbeautifulcitiesintheworld.3.“the+序數(shù)詞+最高級+單數(shù)名詞+in…”

該結(jié)構(gòu)意為“......是……中的第幾……”

TheYellowRiveristhesecondlongestriverinChina.of與in都有“在......當中”的意思。但它們有嚴格的區(qū)別。用of的時候,主語同of后面的詞是指同一類的人或物。而用in的時候,主語同in后面的詞是指不同類的人或物。1.TheAmazonRiverisoneofthe_________riversintheworld.It’salittle________thantheYangtzeRiver.2.Qomolangmais8,848.86meters_______.It’soneofthemost__________placesforseriousmountainclimbers.3.Nooceanintheworldisas________asthePacificOcean.4.AlthoughJapanis_______thanCanada,itis________smaller.PracticeFillintheblankswiththecorrectformsofthewordsinthebox.4abigmuchpopularlongoldhighlongestlongerhighpopularbigoldermuch

太平洋

n.大海，海洋21Writetwocomparisonsabouttwotopics.Writetruefacts.4be.g.Tworivers:theYangtzeRiverandtheAmazonRiverTheYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeisthelongestriverinChina.Twocities:________________and_______________________________________________________________________________________________________________________________________________________________Twoanimals:________________and_______________________________________________________________________________________________________________________________________________________________策略：可以比較城市的面積、人口、歷史等策略：可以比較動物的身高(身長)、體重、奔跑速度、外貌特征以及壽命等MonkeyDogAdogisbiggerthanamonkey.Amonkeyissmallerthanadog,butitclimbsatreefasterthanadog.SingaporeKualaLumpurKualaLumpurisasmodernasSingapore.SingaporeisbiggerthanKualaLumpurandhasalargerpopulationthanKualaLumper.Writefivequestionsusingcomparisons.Thenaskyourpartneryourquestions.4c1._____________________________________________________2._____________________________________________________3._____________________________________________________4._____________________________________________________5._____________________________________________________Whatisthehighestbuildinginourcity?Whatisthebusiestsubwaystationinourcity?Whatisthelargestshoppingmallinourcity?Whichisthebiggestparkinourcity?Whichisthelongestroadinourcity?22Languagepointsas+形容詞/副詞原級+as

表示雙方在程度、性質(zhì)、特征等方面一樣。此句意為“世界上沒有和太平洋一樣大的海洋”，表示“太平洋是世界上最大的海洋”，表示最高級含義，可與表示最高級的句子進行轉(zhuǎn)換。NooceanintheworldisasbigasthePacificOcean.(教材P524a)

asbigas和……一樣大

17Exercise

1.—Areyougoingtotheairportbybus?(2021江西)—I’drathertakeataxi.It’s_____.A.quicker B.cheaper C.thequickest D.thecheapest2.—TheChineselanguageismoreandmorepopular.

—Exactly!It’sbecominga_____languageskillintheinternational

community.

(2021安徽)

A.similarB.difficult C.necessaryD.traditional一、單項選擇AC3.Protectingourselvesisoneof______thingswemustdo.(2021重慶A卷)A.important B.moreimportant

C.mostimportant D.themostimportant4.Billlives_____toschoolthanPeter.(2021天津)A.close B.closed C.closer

D.theclosest

DC5.Withthehelpof5Gtechnology,theappsonthesmartphonecanprovide______functionsfortheusersthanbefore.(2021四川成都)A.many B.more C.most

B6.It’sunbelievablethatmountainscangrow.Accordingtoarecentsurvey,Qomolangmahasrisen______thanbefore.(2021云南昆明)A.lowB.lowerC.highD.higherD7.Themore______youdrive,the______youare.(2021黑龍江大慶)

A.careful;safer B.carefully;safer

C.carefully;safely D.careful;safely8.Childrenusuallyplaythiskindofwordgame______thangrown-ups.

(2021福建)A.well B.better C.bestBB9.—Ithinkthisbookis_____thanthatone.(2021遼寧丹東)

—You’reright.Ipreferthatone.

A.morepopular B.moreuseful

C.lessinteresting D.lessboring

10.—Whichcountryhasa_____population,ChinaorCanada?—China.Canadaisalot_____crowdedthanChina.(2021四川達州)A.bigger;less B.bigger;more

C.smaller;less D.smaller;more

CA1.Chinais_______(large)thananyothercountryinAsia.=Chinaisthe_______(large)countryinAsia.2.Ourcityis