【文档说明】《Unit 7 What’s the highest mountain in the world Section A Grammar focus 4a-4c》PPT课件1-八年级下册新目标英语【人教版.ppt，共(37)页，2.294 MB，由小喜鸽上传

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教学目标八年级英语人教版教学目标1.掌握用adj.和adv.的比较级和最高级的用法2.学会用adj.和adv.的最高级来描述个人喜好LiuXiangistallerthanZhouJielun.Zhou

Jielunistall.YaoMingisthetallestofthem.姚明刘翔周杰伦Lookandsay—What’sthehighestmountainintheworld?—Qomolangma.—How

highisQomolangma?—It’s8,844.43metershigh.It’shigherthananyothermountain.—Whichisthedeepestsaltlakeintheworld?—TheCaspianSeaisthedeepestofa

llthesaltlakes.—DidyouknowthatChinaisoneoftheoldestcountriesintheworld?—Yes,Idid.It’smucholderthantheUS.大多数形容词有三个级。1.原级:(文

中或句中的第一者）Structure:as...as...与..….一样e.g.Tomistall.TimisastallasTom.2.比较级(用于两者之间的比较):Structure：形容词比较级＋than...

e.g.Thisboxisbiggerthanthatone.3.最高级(用于三者或三者以上的比较):Structure:the+形容词的最高级＋of/in/among...e.g.Tomistheheaviestinourclass.Heis

themostpopularinourschool.规则变化1)一般情况下，单音节或双音节的形容词/副词比较级＋er，最高级＋est。如:clever—cleverer—cleverestfew—fewer—fewestsmall—smaller—smalle

st等。2)以e结尾的词，比较级＋r，最高级＋st即可。如：nice—nicer—nicestcute—cuter—cutestlarge—larger—largest3)以辅音字母＋y结尾的变y为i＋er或est如:easy—easier—easiesthappy—happier—hap

piest再如：early,busy,heavy,dirty,lazy也如此。4)重读闭音节，单辅音结尾的，双写这个辅音字母＋er或est的词：①fat—fatter—fattest②thin—thinner—thinnest③hot—hotter—hottest④red—red

der—reddest⑤wet—wetter—wettest⑥big—bigger—biggest5)多音节和部分双音节的词需要在形容词原级前＋more构成比较级，＋themost构成最高级。如：beautiful－morebeautiful－themostbeautifu

l又如:delicious,popular,important,interesting,expensive,creative双音节的词如:careful－morecareful－themostcarefu

luseful－moreuseful－themostuseful少数单音节词也是这样，如：•pleased—morepleased—themostpleased•tired—moretired—themosttired•b)不规则变化：•good—better—best

•well—better—best•bad/badly—worse—worst•many/much—more—most•far—farther—farthest(距离远)far—further—furthest

(程度深)old—elder—eldest(长幼)old—older—oldest(年龄)1.三者或三者以上相比，表示最高程度时，用“the+最高级”的结构表示。这种句式一般常有表示比较范围的介词短语。例如：Zhan

gHuaisthetallestofthethree.Heworks(the)hardestinhisclass.•3.表示“最高程度”的形容词，如excellent，extreme极端的，非常的，perfect等，没有最高级，也不能用比较级。•4.形容词最高级修饰作表语或介词宾语的名词

、代词时，被修饰的词往往省略。•e.g.Heisthetallest(boy)inhisclass.•5.作状语的副词最高级前可以不加定冠词。•e.g.Ofalltheboyshecame(the)earli

est.1.比较级的判断①比较级修饰问题alittle,abit,even,far，much,alot,等可修饰比较级。e.g.TomisalittletallerthanJim.Thisbookismuchmoreinterestingthanthatone

.②同级比较（......than.......)e.g.TheweatherinBeijingiscolderthanthatinXi’an.Ourschoolisbiggerthanyours.③the+比较级e.g.Lucyisthefatterofthetwogirl

s.④“a/an+比较级”表示“又一，再一”e.g.Lilyhasadoll,butshewantsabiggerone.⑤隐性比较（没有than的情况）e.g.Whorunsfaster,LucyorLily?You’db

ettercomeearliernexttime.Heworkedhardlastterm,butheworksevenharderthisterm.⑥越来越......a.比较级+and+比较级b.the+比较级+句子，the+比较级+句

子a.e.g.It’sgettingcolderandcolder.Themoreyouexercise,thebetteryouare.2.最高级考点说明：形容词的最高级前必须加the；副词的最高级前省略the。①范围问题in

ofamonge.g.Tomisthetalleststudentintheclass.Springisthebestseasonoftheyear.②“......之一”问题e.g.Beijingisoneofthebiggestcitie

sintheworld.③“the+序数词+最高级”e.g.Ithinkheisthesecondtallestboyinhisclass.④ofall在所有的......当中Heisthetallestofall.Ofallthegirl

inherclass,sheisthebest.就相当于Sheisthebestofallgirlsinherclass.3.比较级和最高级的转换e.g.Tomisthetalleststudentintheclass.=Tomistallerthananyothers

tudentintheclass.=Tomistallerthanalltheotherstudentsintheclass.=NootherstudentsaretallerthanTom.总结：①anyother+名词单数theother+名词复数②否定+比较级=最高级比较级+

极限=最高级1.Sheis________than________.A.busier/usB.busier/weC.morebusy/usD.morebusy/we2.Janeis________thanBetty.A.lesstallerB.less

tallestC.lesstallD.notastall3.Chinais________countryintheworld.A.thethirdlargestB.thelargestthirdC.thethirdlargeD.athirdlargestBAA4.—Whi

chis____seasoninBeijing?—Ithinkit’sautumn.A.goodB.betterC.bestD.thebest5.—Whichis____,thesun,themoonortheearth?—Themoonis.A.smallB.smallerC.smallest

D.thesmallestDD6.IstudyEnglishas____asmybrother.A.hardB.harderC.hardest7.Whichis____,abicycleoracomputer

?A.expensiveB.moreexpensiveC.themostexpensive8.TheYellowRiverisoneof______riversinChina.A.longB.longerC.thelongestAB

CFillintheblankswiththecorrectformsofthewordsinthebox.bigmuchpopularlongoldhigh1.TheAmazonRiverisoneofthe_______riversintheworld.It’salittle______

_thantheYangtzeRiver.2.Qomolangmais8,844.43meters_____.It’soneofthemost________placesforseriousmountainclimbers.longestlongerhighpopu

lar4a3.Nooceanintheworldisas_____asthePacificOcean.4.AlthoughJapanis_______thanCanada,itis_______smaller.bigoldermuch太平洋

n.大海；海洋Writetwocomparisonsabouttwotopics.Writetruefacts.Tworivers:_________________and__________________________________________________________

_________________________________________________________________________________________________________________________________4bTh

eYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeRiveristhelongestriverinChina.theYangtzeR

ivertheAmazonRiverTwocities:___________and___________1._______________________________.2._______________________________.Twoanimals:__

______and_________1._______________________________.2._______________________________.Tworestaurants:_______and_________1.___________2

.___________Twosupermarket:_______and_______1.___________2.___________Writefivequestionsusingcomparisons.Thenaskyour

partneryourquestions.1._________________________________2.Whatisthebiggestparkinourtown?3.___________________________

______4._________________________________5._________________________________4cWhatisthehighestbuildinginourcity?•

Summary1.复习了形容词和副词的三大级别2.学习了一些重点单词，短语和句型。3.学习了形容词和副词的比较级和最高级的用法1.Tomemorizetheimportantphrasesandsentences.2.

WriteacompositionThemostinourhometown(atleast10sentences)