Unit+7+Section+A++Grammar+Focu 人教版英语八年级下册

Unit7What'sthehighestmountainintheworld?GrammarFocus教材链接What'sthehighestmountainintheworld？Qomolangma.HowhighisQomolangma？It's8,848.86metershigh.It'shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld？TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldestcountriesintheworld？Yes,Idid.It'smucholderthantheUS.语法探究语法详解一、大数的表达与读法1000以上的基数词的表示法：先从右至左数，每三位数加一个逗点(即以此把数目分为若干段)。第一个逗点前的数的单位为thousand(千)，第二个逗点前的数的单位为million(百万)，第三个逗点前的数的单位为billion(十亿)。如：

9,883读作：ninethousand,eighthundredandeighty-three

60,263,150读作：sixtymillion,twohundredandsixty-threethousand,onehundredandfifty注意：(1)英语中没有“万”这个单位，要表示“万”须借用thousand，如：“一万”用“十个千”表示(tenthousand)，“十万”用“百个千”表示(onehundredthousand)。(2)hundred后通常加连词and。若读数中百位数为0，则在thousand后加and，如：6,053读作：sixthousandandfifty-three。二、形容词与副词的比较级和最高级1.概述英语中的形容词和副词有三个等级，即原级、比较级和最高级。2.比较级和最高级的构成(1)规则变化类别规则示例单音节词和部分双音节词一般在词尾加-er或-esttall→taller→tallestfast→faster→fastest类别规则示例单音节词和部分双音节词以字母e结尾的词，直接加-r或-stnice→nicer→nicestlate→later→latest以“辅音字母＋y”结尾的词，先变y为i，再加-er或-esteasy→easier→easiestearly→earlier→earliest以重读闭音节结尾且词尾只有一个辅音字母的词，需双写该辅音字母，再加-er或-estbig→bigger→biggesthot→hotter→hottest类别规则示例多音节词和部分双音节词在词前加more或mostbeautiful→morebeautiful→mostbeautifulcarefully→morecarefully→mostcarefully(2)不规则变化原级比较级最高级

原级比较级最高级good/wellbetterbestfarfartherfarthestbad/badlyworseworstfurtherfurthestmany/muchmoremostoldeldereldestlittlelessleastolderoldest3.形容词与副词的比较级的用法形容词和副词的比较级常用于两者之间的比较，表示两者之间的差异。句式和用法示例“A＋谓语动词＋比较级＋than＋B”用于两者之间的比较，表示“A比B更……”Youaretallerthanyourbrother.HerunsfasterthanTom.句式和用法示例“主语＋谓语动词＋比较级＋thananyother＋可数名词单数”表示“……比(同一范围内)其他任何一个……都……”Qomolangmaistallerthananyothermountainintheworld.“主语＋谓语动词＋the＋比较级＋ofthetwo...”表示“……是两者中较……的那一个”Jackisthethinnerofthetwobrothers.句式和用法示例“the＋比较级...,the＋比较级...”，表示“越……，就越……”Theharderyoustudy,thebettergradesyou'llget.“比较级＋and＋比较级”或“moreandmore＋多音节及部分双音节形容词或副词的原级”表示“越来越……”Ourcountryisbecomingstrongerandstronger.It'ssnowingmoreandmoreheavily.句式和用法示例“疑问词(组)＋谓语动词＋比较级，AorB？”表示“A和B哪个更……？”Which(country)isbigger,ChinaorCanada？注意：(1)在上下文意思明确的情况下，也可以单独使用比较级。如：Thiscoatistoosmall.Doyouhavealargerone?(2)比较级前可用far，even，alot，alittle，abit，much等修饰，表示程度。如：YouknowevenlessaboutitthanIdo.4.形容词与副词的最高级的用法形容词和副词的最高级常用于三者或三者以上的人或事(物)之间的比较。句式和用法示例“主语＋谓语动词(＋the)＋最高级(＋名词)＋in/of...”，表示“……在某一范围内/某类人或物中(是)最……(的……)”Sheistheyoungestinourclass.Sheistheyoungestofallthestudents.句式和用法示例“主语＋谓语动词＋oneofthe＋形容词最高级＋复数名词＋in/of...”表示“……是某一范围内/某类人或物中最……的……之一”Itisoneofthewidestroadsinourtown.句式和用法示例“主语＋谓语动词＋the＋序数词＋形容词最高级＋名词＋in/of...”表示“……是某一范围内/某类人或物中第……的……”LiMingisthesecondtallestboyinourclass.“疑问词(组)＋谓语动词(＋the)＋最高级，A,BorC？”表示“在A、B、C中，……最……？”Whichisthebiggest,themoon,theearthorthesun?注意：(1)形容词最高级作表语时，the有时可省略。如：Heis(the)strongest.(2)副词最高级前的the一般可以省略。如：Jimjumps(the)highest.(3)最高级前有名词所有格或形容词性物主代词时，不加the。如：Sheismybestfriend.(4)当most表示“非常”时，前面不用the。如：Heisamostinterestingman.5.最高级与比较级之间的转换形容词与副词的最高级可与“比较级＋than＋anyother＋单数名词”或“比较级＋than＋theother＋复数名词”进行相互转换。如：Tomisthetallestinhisclass.＝Tomistallerthananyotherstudentinhisclass.＝Tomistallerthantheotherstudentsinhisclass.一、单项填空(

)1.(2023北京)—Whichdoyoulike________,

swimmingorskating?—Swimming.A.well B.betterC.best D.thebestB语法专练(

)2.(2023雅安)—Mikeplaysbasketballwell.Doyouknowhim?—Sure.Heisalsooneof________basketballplayersinourclass.A．tall B.thetallerC.tallest D.thetallest(

)3.—Excuseme,Mary.Canyouread“198”inEnglish?—Yes,ofcourse.________.A．Onehundredninety-eight B.OnehundrednineeightC．Onehundredandninety-eight D.OnehundredninetyeightDC(

)4.Wearehappytoseeourcityisdeveloping________theseyearsthanbefore.A.quickly B.morequicklyC.veryquickly D.themostquickly(

)5.________youare,________mistakesyou'llmakeinthetest.

A.Themorecareful;thefewer B.Themorecarefully;thefewerC.Themorecareful;theless D.Themorecarefully;thelessBA二、按要求完成下列句子1.Themountainisabout1,350metershigh.(对画线部分提问)__________isthemountain?2．PoyangLakeisthebiggestfreshwaterlakeinChina.(对画线部分提问)__________thebiggestfreshwaterlakeinChina?3.TheNileisthelongestriverintheworld.(改为同义句)TheNileis_______________________riverintheworld.HowhighWhichislongerthananyother4.NochildistallerthanPeterinhisclass.(用最高级改写句子)Peteris_____________childinhisclass.5.Mysisteris10yearsold.Mybrotheris7yearsold.(用比较级改写句子)Mysisteristhreeyears____________mybrother.thetallestolderthan三、小语篇选择(跨学科：地理)DoyouknowtheSahara?Itis__1__desertintheworld.Manypeoplethinkithasalwaysbeenadesert,__2__theyarewrong.AtonetimetheSaharawasunderwater,andthenthewaterwentawayandthingsgrew.However,hotwindsmadeeverythingverydryandthennothing__3__grow.Duringtheday,theSaharacanbeoneof__4__places.Oneday,in1924,itwas136.4°F,or58℃.Atnight,however,itisnotsohot.Andinwinteritcanbeverycold.Notmanybiganimalscanliveinthedesert.Thecamel(骆驼)isthebestknownandthereisalsoakindofdeer.Theseanimalscanlive__5__alongtimewithoutwater.Therearealsopeoplelivinginthedesert.TheyarecalledBedouins(贝都因人).Theydon’tliveinthesameplaceallthetime,butmoveaboutfromplacetoplace.(

)1.A.big B.biggerC.thebiggest(

)2.A.and B.butC.so(

)3.A.could B.shouldC.must(

)4.A.hot B.hotterC.thehottest(

)5.A.with B.forC.onCBACB一、语法选择Chinaisagreatcountrywithmorethan5,000yearsofhistory.Therearemanyplacesofinterestandsomeof__1__arebeautifulmountains,riversandlakes.Theyattract(吸引)millionsoftouristsallaroundtheworldeveryyear.Manymountainsarefamous__2__theviewsfromthetop,suchasMountTai,MountEmeiandMountHua.MostpeopleenjoygoingcampinginMountTai__3__thesunrise.巩固提升(

)1.A．them B.they

C.themselves(

)2.A．in B.for

C.with(

)3.A．watch B.towatching

C.towatchABCTheriversinChinaarealso__4__knownaroundtheworld.TheYangtzeRiveris__5__oneandthesecondlongestoneistheYellowRiver.TheyarethebirthplacesofChineseculture__6__Chineseancestors(祖先)wereborninthatareas.(

)4.A．wide B.widely

C.width(

)5.A．long B.longer

C.thelongest(

)6.A．because B.unless

C.ifBCATherearealsoagreatnumberof__7__.TheWestLakeinZhejiangProvinceismyfavoriteone,andI__8__itlastyear.Peoplereallylovethebeautifulscenery(风景)there,__9__manypoets(诗人)wroteforitinthepast.Haveyoueverheardof__10__lovestoryaboutXuXianandtheWhiteSnake?ItissaidthatthelovestoryhappenedontheWestLake.(

)7.A．lake B.lakes

C.lake's(

)8.A．visit B.willvisit

C.visited(

)9.A．and B.but

C.or(

)10.A．an B.the

C.aBCAB二、短文填空请从方框内选择适当的词并用其正确形式填空，使文章完整连贯。注意每空一词，每词仅用一次，有两词为多余项。watch

too

long

place

but

thousand

use

either

man

when

it

soTheGreatWallofChinahasahistoryofovertwothousandyears.ItrunsfromtheeasttothewestinNorthChina.Itisabout6,300kilometers1.______.Sometimeswea