形容词比较级和最高级变化规则:变化规则一、规则变化：单音节词和少数双音节词，加词尾-er，-est来构成比较级和最高级。1)一般单音节词未尾加-er,-est:talltallertallest；greatgreatergreatest2)以不发音的e结尾的单音词和少数以-le结尾的双音节词只加-r,-st:nicenicernicestlargelargerlargestableablerablest3)以一个辅音字母结尾的闭音节单音节词，双写结尾的辅音字母再加-er，-est：Bigbiggerbiggest;hothotterhottest4)以辅音字母+y"结尾的双音节词，改y为i，再加-er，-est：busybusierbusiest；easyeasiereasiest5)少数以-er，-ow结尾的双音节词未尾加-er，-estclevercleverercleverest；narrownarrowernarrowest6)其他双音节词和多音节词，在前面加more，most来构成比较级和最高级。Important-moreimportant-mostimportant；easily-moreeasily-mosteasily二、不规则变化原级比较级最高级Good/wellbetterbestbad/illworseworstoldolder/elderoldest/eldestelder，eldest只用于兄弟姐妹的长幼关系。much/manymoremostlittlelessleastfarfarther/furtherfarthest/furthest*farther，further.在英语中两者都可指距离。在美语中，father表示距离，further表示进一步。havenothingfurthertosay.I构成:构成比较级形容词物体A+am/are/is+形比+than+物体B.Iamtallerthanyou.Pastaismoredeliciousthanpizza.副词物体A+行为动词+副比+than+物体B.Cheetahsrunfasterthangoats.Hestudiesbetterthanme.最高级1）物体A+am/are/is+the+形最高级+比较范围（of+人/物，in+地方）.Iamthetallestintheclass.Pastaisthemostdeliciousfoodofthethree.2）物体A+行为动词+副词最高级+比较范围（of+人/物，in+地方）.Cheetahsrunfastestintheworld.ItisthelargestislandinEurope.易错点：易错点：1）要避免重复使用比较级。(错)Heismoreclevererthanhisbrother.(对)Heismorecleverthanhisbrother.(对)Heiscleverthanhisbrother.2）要避免将主语含在比较对象中。(错)ChinaislargerthananycountryinAsia.(对)ChinaislargerthananyothercountriesinAsia.(错)Tomisthetallestofhisthreebrothers.(对)Tomisthetallestofthethreebrothers.3）要注意对应句型，遵循前后一致的原则。ThepopulationofShanghaiislargerthanthatofBeijing.Itiseasiertomakeaplanthantocarryitout.4）要注意冠词的使用，后有名词的时候，前面才有可能有名词。比较：Whichislarge,CanadaorAustralia?Whichisthelargercountry,CanadaorAustralia?Sheistallerthanhertwosisters.Sheisthetallerofthetwosisters.比较级引申用法：比较级引申用法：引申用法1.在"which...,...or...?"句中，表示两者比较：Whichisbigger,thesunorthemoon?2.比较级+and+比较级，越来越：It'sgettingdarkeranddarker.Heisgettingmoreandmoreinterestedinsports.3.Themore...,themore...：越***就越**：Themoreyoueat,themoreyouwant.Thebusierheis,thehappierhefeels.4.Morethan