小学英语比较级和最高级

Unit5TheworldofmydreamsByShirleyJapanissmallerthanAustralia.WatermelonisbiggerthanappleSnowWhiteismorebeautifulthanthequeenShanghaiislargerthanAnyang.比较级句子结构：A+be+形容词比较级+than+BForexample：TomisolderthanBill.Thetreeistallerthantheflower.KateismorebeautifulthanMary.HispictureisnicerthanhersChenglongistallerthanPanchangjiang.YaoMingisthetallestofthethree.世界历史上最高的人，身高达到3.19米詹世钗ZhanShichaiisthetallestpeopleintheworld.TheNileisthelongestriverintheworld.1尼罗河全长6750千米，流域面积约287万平方千米。2亚马孙河全长6436千米，其流域面积691.5万平方千米。3长江全长6300多千米，年平均流量每秒31900立方米。Russiaisthelargestcountryintheworld.1707.55万平方公里（世界国家和地区第1名；占苏联领土面积的76%），水域面积占13%，是世界上面积最大的国家。最高级的句子结构：A+be+the+最高级+范围Forexample：Russiaisthelargestcountyintheworld.Lucyisthetallestgirlintheclass.TheNileisthelongestriverintheworld.talltallerthetallestLiMeiLilyKatebeautifulbeautifulmorebeautifulthemostbeautifulfastfasterthefastestthestrongestbabyTomMr.Blackbigbiggerthebiggest•一、形容词的比较级形容词比较级在句子中的运用：两个事物或人的比较用比较级，比较级后面一般带有单词than。•最高级的用法•表示三者或三者以上（人或事物）的比较用最高级，最高级的前面一定要加定冠词the，形容词比较级和最高级的规则变化•1:单音节词，在词尾加er构成比较级，•加est构成最高级。tall--taller--thetallestlong—longer—thelongestsmall—smaller—thesmallestshort—shorter—theshortestnew—newer—thenewest•2:以不发音的e结尾,直接在词的后面加r构成比较级,加st构成最高级nice--nicer–thenicestlarge–larger–thelargest重读闭音节词,双写结尾的辅音字母,再加er构成比较级，加est构成最高级。hot–hotter--thehottestbig—bigger—thebiggestfat—fatter—thefattestthin—thinner—thethinnest以辅音字母+y的词,把y变i加er构成比较级，把y变i加est构成最高级。easy--easier–theeasiestbusy–busier–thebusiestheavy—heavier—theheaviesthappy—happier—thehappiest双音节词多音节词在前加more构成比较级，加most构成最高级。beautiful--morebeautiful–themostbeautifulimportant--moreimportant—themostimportant形容词比较级和最高级的不规则变化good–better--bestbad–worse--worstmuch–more--mostmany–more--mostlittle–less--least•一、写出下列形容词的比较级••old______young_____tall____•long_____short______strong_____•big_______small_____fat____•thin______heavy______high______•late______early_____cool_______￥500￥500Theyellowcoatisexpensive,too.Thebrowncoatisexpensive.Thebrowncoatisasexpensiveastheyellowone.famousZhouxingchiisasfamousasLiudehua.as…as之间一定要用形容词或副词原形,表示“和······一样······”notso/as…as…用于否定句,表示“和……不一样……”TheyarenotsofamousasZhoujielun二、根据句意填入单词的正确形式•1.Mybrotheristwoyears_______(old)thanme.•2.Tomis____(tall)thanJim.•3.Isyoursister_______(young)thanyou?Yes,sheis•4.Whois______(thin),youorHelen?Helenis.•5.Whosepencil-boxis_________(big),yoursorhers?Hersis..•6..Whichis_______(heavy),theelephantorthepig?•7..Whogetsup________(early),TimorTom?oldertalleryoungerthinnerbiggerheavierearlier