比较级PPT

形容词的比较级变化规则与用法比较级变化规则1、规律变化：单音词的变化：（四条）①一般情况：+er(比较级)+est(最高级)eg:young--younger—theyoungestbright--brighter---thebrightest明亮/聪明的high--higher--thehighest②词末为--e（不发音）+r--+steg:fine--finer--thefinestnice--nicer--thenicestclose--closer--theclosestlarge--larger--thelargest③重读闭音节，末尾只有一个辅音字母的：双写辅音字母+er--双写辅音字母+esteg:hot--hotter--thehottestbig--bigger--thebiggestsad--sadder--thesaddestfat--fatter--thefattestthin--thinner--thethinnest④少数以辅音字母+y结尾的双音节原根词：变y为i+er变y为i+esteg:busy--busier--thebusiestheavy—heavier—heaviesthappy—happier--happiest⑤其他双音节和多音节词都在前面加单词more和mosteg:moredifferentmostdifferentmoreoutgoingmostoutgoing2.不规则变化：good\wellbetterbestbad\illworseworstmany\muchmoremostlittle\fewlessleastfarfarther\furtherfarthest\furthest3.用法1.比较级由“Ais+形容词(副词)比较级＋than＋B…，”构成表示在两者中间一方比另一方“更加…”。连词than后可接句子，也可接名词、代词、名词短语、Eg:ChinaisbiggerthanUS.Iamshorterthanyou.Now,Ifeelbetterthanbefore.1.最高级用于三者以上比较，形容词的结构形式是“定冠词＋形容词最高级＋名词＋表示范围的短语或从句”(如all,ofall,ofthetree,intheworld,thathasevertakenplace等)Eg:heisthetalleststudentinourclass.Shaismostbeautifulwomanofthethreepeople4.形容词和副词的特殊用法一、形容词与副词的同级比较：由“as(so)+原级…as”引出，其否定式为“notso+as…”或“notas…as”,Eg:johnisnearlyastallashiefather.HeisasbusyasbeforeHeisn’tasoldashelooksHeisnotsohandsomeashisbrother.二.“比较级＋比较级”或“moreandmore+形容词或副词的原级”结构表示事物特征的逐渐递进，常翻译为“越来越……”eg:thankstothenewprojects,ourcityisbecomingmoreandmorebeautiful三、“the+比较级……，the+比较级……”结构表示两个过程按比例同时递增，常翻译为“越……越……”，两个分句中，前者为从属从句，后者为主句。eg;Theearlieryoustart,themorequicklyyou’llfinishit.四、“the+比较级+ofthetwo”结构表示“两者当中较……的”，通常要在形容词比较级前面加the,还可以省去形容词后面的名词。eg:Whichisthelargerofthetwocountries,CanadaorAustralia?练习.根据句意，用所给词的适当形式填空。1.Travelingbyairis_______thanbytrain.(expensive)2.Whichriveris________,theYangtzeRiverortheYellowRiver?(long)3.Thesickmanisgetting________.(ill)4.Springisthe_______timetoplanttrees.(good)5.WearesureHongKongwillbeeven_________tomorrow.(good)6.Whichplayofthetwois_________?(interest)7.Mybrotheristwoyears________thanI.(old)8.Whichis________,theblouse,theshirtorthatone?(nice)()1.MostofthepeopleinGuangdongaregetting________.A.moreandmorerichB.morerichandmorerichC.richerandricherD.richerandrichest()2.Whichis____,abus,acaroraplane?A.thefastestB.mostfastC.fastD.faster()3.LiHua’sEnglishisverygood,andherFrench__________herEnglish.A.isasgoodasB.isn’tasgoodasC.isaswellasD.isasbetteras()4.Who’s_______inyourclass?A.strongB.strongerC.strongestD.thestrongest()5.Jonelooksso_______todaybecauseshehasgotan“A”inhermathtest.A.happyB.happilyC.angryD.angrilyA()6.Hedraws______hisuncle.A.aswellasB.asgoodasC.asbetterasD.asbestas()7.Jackisalittle_____thanPeter.A.strongB.strongerC.strongestD.thestrongest()8.InChangchun,theairinJingYueForestParkismuch_____thanthatinthecenterofthecity.A.clearB.cleanerC.cleanD.nice()9.Tokyoislargerthan____inJapan.A.anyothercityB.anycityC.theothercity