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2形容词的比较级和最高级比较级/最高级变化规则：1、规则变化:(1)单音节和部分双音节形容词和副词,在原级的后面加上er,est构成比较级和最高级。情况构成方法原级比较级最高级一般情况加-er或-estnewlongnewerlongernewestlongest以不发音e结尾的词加-r或-stfinelatefinerlaterfinestlatest以“辅音+y”结尾的词变y为i再加-er或-estearlyhappyearlierhappierearliesthappiest重读闭音节先双写辅音字母，再加-er或-esthotthinhotterthinnerhottestthinnest(2)两个音节或两个以上的音节的,在原级前加more/most.原级比较级最高级useful(有用的)moreusefulmostusefuldifficult(困难的)moredifficultmostdifficultdelicious（美味的）moredeliciousmostdelicious2、不规则变化(两好两坏两多一少一老一远)原级比较级最高级good好的better更好的best最好的well好；(身体)好的,bad,badly糟糕的,糟糕地worse更糟糕的,更糟糕地；(身体)更不舒服的worst最糟糕的,最糟糕地；(身体)最不舒服的ill(身体)不舒服的many许多的(可数)more更多的；更most最多的；最much许多的(不可数)；非常little少的less更少的least最少的far远的；远地farther更远的；更远地farthest最远的；最远地further进一步的(地)furthest最深刻的(地)2(1)形容词older/elder和oldest/eldest的用法区别：区别：elder与eldest主要用于表明长幼关系，通常用于人，只做定语不做表语，也不与than连用。Thisismyeldestson.这是我的大儿子。Hiselderbrotherworksinaclothingfactory.他哥哥在一家服装厂工作。(2)形容词farther/further和farthest/furthest的用法区别：a)表示距离时，四个词都可用。Icanthrowmuchfarther/furtherthanyou.我可以比你扔得更远。What’sthefarthest/furthestdistanceyou’veeverrun?你跑过最远的距离是多少？b)如果用于引申义，表“更进一步”、“更多”、“此外”等义，只能用further。如：We’llfurtherdiscussit.我们会进一步讨论它。形容词原级用法1）A+谓语+as+adj/adv原级+as+B：表示“A和B一样……”eg:TomisastallasBob./HedoeshishomeworkascarefullyasTom.A+谓语+（倍数）+as+adj/adv原级+as+B：表示“A是B的几倍……”Thisappleisthreestimesasbigasthatone.这个苹果是那个苹果的三倍。A+谓语否定形式（not）+as（so）+adj/adv原级+as+B表示“A不如B……”否定形式可用比较级进行句型转换。Tomisnotas/sotallasBob.=BobistallerthanTom.2）assoonaspossible\assoonasyoucan：尽可能地快；aswellas和…一样好\也，又比较级用法1）…比较级+than…；eg:Ahorseisheavierthanasheep.Which/whois+（the）比较级，AorB?；eg:Whichistheolder,TomorBob?倍数+比较级+than…eg:Thisappleisthreestimesbiggerthanthatone.2)比较级and比较级（单音节词）表示越来越……moreandmore+原级（多音节词）eg:Thetreegrowstallerandtaller.Ourenvironmentisbecomingmoreandmorebeautifulwithourhardwork.3）The+比较级……，the+比较级……：表示“越……越……”eg:Themoremoneyyoumake，themoreyouspend.24）比较级前可用much、even、far、abit、alittle等来修饰；原级前可用very、too、so、enough、rather、quite等修饰。Thegirlismuchmorebeautiful.Theboyismuchtaller.(切记不能用more来修饰比较级，more本身的构成多音节形容词的比较级)Thebookisquitecheap.5)“the+比较级+ofthetwo”表示“两者中比较…”如：Heistheclevererofthetwoboys.6)“比任何一个都…”“形容词的比较级+thananyother+单数名词”(范围内)可以与最高级进行互换“形容词的比较级+thanany+单数名词”（范围外）如：Heistallerthananyotherboyinhisclass=Heisthetallestboy……ChinaislargerthananycountryinAfrica.中国比非洲的任何一个国家都大。最高级用法1）the+最高级+由of/in构成的表示范围的介词短语在…最…Iamthetallestofallthestudentsinmyclass.2）oneofthe+最高级+名词复数最…之一BeijingisoneofthebiggestcitiesinChina.3）the+序数词+最高级：表示某个范围内在第几位TheYellowRiveristhesecondlongestriverinChina.注：形容词的最高级前面一般要加定冠词the，但当形容词最高级前有物主代词、名词所有格等修饰词时，则不用定冠词the。Thisismybusiestday.这是我最忙的一天.课堂练习写出以下形容词与副词的比较级与最高级nice－_______－_______；thick－_______－_______；small－_______－_______；fine－_______－_______；hot－_______－_______；heavy－_______－_______；slowly－_______－_______；carefully－_______－_______；far－_______－_______；little－_______－_______beautiful－_________－_________careful－_______－_______选择题1.Don'tworry,sir.I'msureIcanrun_________tocatchupwiththem.A.slowlyenoughB.enoughslowlyC.fastenoughD.enoughfast2.Thetextisveryeasyforyou.Thereare________newwordsinit.A.afewB.alittleC.fewD.little3.It'ssuchan________filmthatallthestudentsare______init.2A.interesting;interestedB.interested;interestingC.interesting;interestingD.interested;interested4.MostofthepeopleinGuangdongaregetting________.A.moreandmorerichB.morerichandmorerichC.richerandricherD.richerandrichest5Whichlessonis_______,thisoneorthatone?A.difficultB.muchdifficultC.moredifficultD.themostdifficult6..A______accidenthappenedat7:30a.m.saidthepoliceman_______.A.serious,seriousB.seriously,seriouslyC.seriously,seriousD.serious,seriously7.Inourcity,itis______inJuly,butitiseven_______inAugust.A.hotter;hottestB.hot;hotC.hotter;hotD.hot;hotter8.Indiahasthesecond_______populationintheworld.A.largerB.mostC.smallestD.largest9.Thecakesmells______.Pleasethrowitaway.A.goodB.badlyC.badD.well10.---Whatwastheweatherlikeyesterday?---Itwasterrible.Itrainedso________thatpeoplecould_______goout.A.hardly…hardB.hardly…hardlyC.hard…hardlyD.hard…hard课后作业()1.Theearthisabout____asthemoon.A.asfiftytimebigB.fiftytimesasbigC.asbigfiftytimesD.fiftyastimesbig()2.Beijingisoneof____inChina.A.thelargestcityB.thelargecitiesC.thelargercitiesD.thelargestcities()3.Yourroomis___thanmine.A.threetimebigB.threetimesbigC.threetimesbiggerD.biggerthreetimes()4.Englishisoneof____spokenintheworld.A.theimportantlanguagesB.themostimportantlanguagesC.mostimportantlanguageD.themostimportantlanguage()5.Mathsismorepopularthan____.A.anyothersubjectB.allthesubjectsC.anysubjectD.othersubject()6.Chinaislargerthan____inAfrica.A.anyothercountryB.othercountriesC.theothercountryD.anycountry()7.Tomisstrongerthan___inhisclass.A.anyotherboyB.anyboysC.anyboyD.otherboy()8.Whenspringcomes,itgets____.A.warmandwarmB.colderandcolderC.warmerandwarmerD.shorterandshorter()9.Tomisoneof____boysinourclass.A.tallestB.tallerC.thetallestB.thetall()10.Thefifthorangeis____ofall.Giveittothatsmallchild.A.bigB.biggerC.thebiggerD.thebiggest2()11.Whenspringcomesthedaysget____andnights____.A.short;longB.long;shortC.longer;short