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SectionA3(Grammarfocus—4c)Grammarfocus—What’sthehighestmountainintheworld?—Qomolangma.—HowhighisQomolangma?—It’s8,844.43metershigh.It’shi

gherthananyothermountain.—Whichisthedeepestsaltlakeintheworld?—TheCaspianSeaisthedeepestofallthesaltlakes.—D

idyouknowthatChinaisoneoftheoldestcountriesintheworld?—Yes,Idid.It’smucholderthantheUS.Step1Lead-inPlayavideo:Themore

wegettogetherAndthenshowsomepictures.ReviewcomparativesandsuperlativesStep2Grammar形容词和副词比较级和最高级变化规则1大多数形容词有三个级。1)原级:常用结

构as...as...像……一样ZhangHongisastallasTom.张红和汤姆一样高。2)比较级(用于两者之间的比较)常用结构：形容词比较级＋than...HeistallerthanI.他比我高。3)最高级(用于三者或三者以上的比较),常用结构:th

e+形容词的最高级＋of/in...Heisthetallestofthethree.他是这三个人中最高的。Heisthefunniestinhisclass.他是他们班最有趣的。2.形容词、副词比较级和最高级规则变化和不规则变化。规则变化1)一般情况下，单音节或双音节的形容词（或副词）比较级＋

er，最高级＋est如：clever－cleverer－cleverestfew－fewer－fewestsmall－smaller－smallest等。2)以e结尾的词，比较级＋r，最高级＋st即可。如：nice－nicer－nicest

cute－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－happiest再如：early,busy,heavy,dirty,l

azy也如此4)双写最后一个辅音字母＋er或est的词,同学要用心去记。fat－fatter－fattestthin－thinner－thinnesthot－hotter－hottestred－redder－reddest

wet－wetter－wettestbig－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－morebeautif

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

luseful－moreuseful－themostuseful少数单音节词也是这样，如：pleased－morepleased－themostpleasedtired－moretired－themosttired2.不规则变化：good—better—bestw

ell—better—bestbad－worse－worstmany/much—more—mostfar—farther—farthest(距离远)far—further—furthest(程度深)old—elder—eldest(长幼)old—older—olde

st(年龄)Readthesentencesbelow.—What’sthehighestmountainintheworld?—Qomolangma.—HowhighisQomolangma?—It’s8,844.43metershigh.It’shigherthananyothermo

untain.—Whichisthedeepestsaltlakeintheworld?—TheCaspianSeaisthedeepestofallthesaltlakes.—DidyouknowthatChinai

soneoftheoldestcountriesintheworld?—Yes,Idid.It’smucholderthantheUSStep2中考链接1.比较级考点①比较级修饰问题alittle,abit,even,stil

l,much,alot,far等可修饰比较级。e.g.TomisalittletallerthanJim.Thisbookismuchmoreinterestingthanthatone.②同级比较e.g.TheweatherinBeijing

iscolderthanthatinXi’an.Ourschoolisbiggerthanyours.③the+比较级e.g.Lucyisthefatterofthetwogirls.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’dbettercomeearliernextti

me.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.Themoreyouex

ercise,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e.g.Tomisthetalleststudentintheclass.Springisthebestseasonoftheyea

r.②“......之一”问题e.g.Beijingisoneofthebiggestcitiesintheworld.③“the+序数词+最高级”e.g.Ithinkheisthesecondtallestboyinhisclass.3.比较级和最高

级的转换e.g.Tomisthetalleststudentintheclass.=Tomistallerthananyotherstudentintheclass.=Tomistallerthanalltheotherstudentsintheclass.=Nootherstu

dentsaretallerthanTom.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2.同级比较①as+adj./adv.+ase.g.SheisasthinasLily.Hewritesas

carefullyasLinda.②not+as/so+adj./adv.+ase.g.Tonydidn'trunsofastasCarter学以致用1.Mybrotheris___moreoutgoingthanme.A.manyB.littleC.much2.O

ctober12thwasoneof______daysin2005.Shenzhou-VIwaslaunched(发射）successfully.A.excitingB.moreexcitingC.themostexciting3.Whichcityis______,Bei

jing,ShanghaiorFuzhou?A.beautifulB.morebeautifulC.themostbeautiful4._____childrenthereareinafamily,____theirlifew

illbe.A.Theless,thebetterB.Fewer,richerC.Thefewer,thebetter5.Mobilephonesareverypopularnowandtheyare______thanbe

fore.A.cheapB.cheaperC.thecheapest6.Inourcity,it’s_____inJuly,butit’seven_____inAugust.A.hotter,hotte

stB.hot,hotC.hot,hStep3Fillintheblankswiththecorrectformsofthewordsinthebox.bigmuchpopularlongoldhighStep4Writetwocomparisonsabouttwotopics.Write

truefacts.e.g.Tworivers:theYangtzeRiverandtheAmazonRiverTheYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtze

RiveristhelongestriverinChina.Twocities:___________and___________1._______________________________________________________________.2

._______________________________________________________________.Twoanimals:___________and___________1._____

_________________________________________________________.2.______________________________________________________________.Step5HomeworkWr

itefivequestionsusingcomparisons.Thenaskyourpartneryourquestions1.Whatisthehighestbuildinginourcity?2.Whatisthebusiestsubwaystat

ioninourcity?3.Whatisthelargestshoppingmallinourcity?4.Whichisthebiggestparkinourcity?5.Whichisthelongestroadinourcity?