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Unit5比较级和最高级的用法一、形容词、副词的比较级、最高级的构成规则：1一般在形容词、副词后加上er表示比较级加上est表示最高级原级比较级最高级1）smallsmallsmall2)youngyoungyoung3)fastfastfasteresteresterest2以不发音的e结尾的，只加上r表示比较级，加上st表示最高级。1)largelargelarge2)nicenicenice3)finefinefinerstrstrst3以辅音字母+y结尾的，去掉y,然后加上er表示比较级；加上est表示最高级。原级比较级最高级1）earlyearlyearly2)happyhappyhappyieriestieriest4双写最后一个辅音字母，然后加上er表示比较级；加上est表示最高级。原级比较级最高级1）bigbigbig2)thinthinnerthinnest3)wetwetterwettest4)fatfatterfattest5)hothotterhottestgergest5双音节和多音节的形容词，副词，在这些形容词和副词前加上more表示比较级；加上most表示最高级。原级比较级最高级1)happilyhappilyhappily2)heavilyheavilyheavilymoremostmoremost构成原级比较级比较级单音节和少数双音节单词一般词尾加-er,-esttall,long,old,smalltaller,longer,older,smallertallest,longest,oldest,smallest以字母e结尾的形容词或副词,直接加-r,-stnice,fine,largenicer,finer,largernicest,finest,largest以重读闭音节结尾的形容词或副词,如末尾只有一个辅音字母,双写该字母,再加-er,-estbig,hot,red,thinbigger,hotter,redder,thinnerbiggest,hottest,reddest,thinnest以“辅音字母+y”结尾的形容词或副词，把y变为i，再加-er,-estbusy,early,easybusier,earlier,easierbusiest,earliest,easiest二、不规则形容词、副词的比较级最高级原级比较级最高级good/wellbetterbestmany/muchmoremostlittlelessleastill/bad/badlyworseworstfarfarther/furtherfarthest/furthestoldolder/elderoldest/eldest注：older一般指年龄大小；Myfatherisolderthanmymother.elder指长幼关系(一般修饰名词作定语);Myelderbrotherisadriver.farther指距离更远；further指抽像的.IwanttostudyEnglishfurther.furtherreading原级比较级最高级fastshortbigthinfunnyheavyathleticexpensivefarfastershorterbiggerthinnerfunnierheaviermoreathleticmoreexpensivefartherfastestshortestbiggestthinnestfunniestheaviestmostathleticmostexpensivefarthestTomisastallasMike.as+形容词原形+asThereareasmanystudentsinourschoolasyours.TomisthreetimesasoldasMike.比较级+than…Thisbridgeislongerthanthatone.Ourschoolislargerthantheirs.同义句转换1.FlatAismoreexpensivethanFlatBFlatBis_______________thanFlatA.FlatBis_______________FlatA.FlatBisnot_________________FlatA.betterthan2.Heisthetalleststudentintheclass.Heis______________________________intheclass.tallerthananyotherstudentanyother+名词单数lessexpensivecheaperthanasexpensiveas比较级的用法：…than…1.汤姆比杰克高.2.这只箱子要比那只箱子大.3.那些苹果比这些大.4.第一个问题很容易,但第二个更容易.TomistallerthanJack.Thisboxisbiggerthanthatone.Thoseapplesarebiggerthantheseones.Thefirstquestionisveryeasy,butthesecondoneiseasier.。1.Whichdoyoulike______(well),applesororanges?2.Whois______(old),JimorTom?3.Jackisrunning_____and______(fast).4.Ourcountryisbecoming______and___________(beautiful).5.Heis________(tall)ofthethetwoboys.betterolderfasterfastermoremorebeatifulthetallerfastfasterfastest◇Lookatthepicturesandunderstand看图并理解ZenZhiweiisshort.TomisshorterthanZenZhiwei.Xiaoxinistheshortestofthem.LiuYifeiisthin.XiaomingisthinnerthanLiuYifei.MikeisthethinnestofallCompetition(写出下列单词的比较级和最高级)•1popular2short3thin4funny5good1popular/morepopular/mostpopular2short/shorter/shortest3thin/thinner/thinnest4funny/funnier/funniest5good/better/best肥肥-沈殿霞100kgheavyheavier180kgtheheaviest220kgMr.WangMr.LiMissShenisheavy.Mr.Wangisheavier.Mr.Liistheheaviestofthethree.funnyfunnierthefunniestGeYouisfunny.ZhaoBenshanisfunnier.PanChangjiangisthefunniestofthem.250,000RMB.50,000RMB.Thegreencaristhemostexpensive.Theredcatismoreexpensivethanthebike.Thebikeisexpensive.500RMB形容词和副词的比较级和最高级的用法及常用句型（1）前者程度超过后者用比较级：A+比较级+than+BHeistallerthanshe.（2）三个或三个以上比较用最高级：A+(the)+最高级+of/in+范围Heisthetallestinhisclass.YaoMingisJordan.Jordanistall.YaoMingistaller.Jordan2.26m1.98mtallerthanZengZhiweiisshort.PangChangjiangisPangChangjiangisZengZhiwei.shorter.shorterthanWhichgoesfaster,thebikeorthecar?Thecargoesfasterthanthebike.Thebikegoesfast.Whichrunsfaster,thedogorthesheep?Thedogrunsfasterthanthesheep.Thesheeprunsfast.Whoismorebeautiful,thegirlorthenurse?Thenurseismorebeautifulthanthegirl.Thegirlisbeautiful.JimTomWhoismoreathletic?TomismoreathleticthanJim.Jimisathletic.•用所给形容词或副词的适当形式填空：•1Hegetsupalittle________thanI.(early)•2Youdothework_____thanTom.(well)•3Sheismuch______thanherbrother.(short)•4Thispictureis_____________thanthatone.(beautiful)•5Whichis______,thesunorthemoon?(big)•6Jackis___________ofthetwoboys.(clever)earlierbettershortermorebeautifulbiggerthecleverer比较级用法：两者比较，常用句型：A+(much,alittle等修饰词)比较级+than+B•完成句子：•1这个盒子比那个重。•Thisboxis_____________thatone.•2你下次一定要做得更好。•Youmust__________nexttime.•3他学习比他的哥哥努力得多。•Hestudies_________________hisbrother.•4.谁想去最远的那个公园?•Whowantstogoto__________park?heavierthandobettermuchharderthanthefarthest知识回顾KnowledgeReview