形容词和副词的比较级和最高级重点:1、了解形容词、副词比较级以及最高级的构成规则；2、了解形容词、副词比较等级的用法。热身练习一、口语训练1、用正确的语音、语调朗读下列短文。Thesealooksverybeautifulwhenthesunisshiningonit.Itcanbeveryterriblewhenthereisastrongwind.Theseaisverybig.Itcoversthreequartersoftheearth.Theseaisalsoverydeepinsomeplaces.Thereisoneplace----theseaisabout11kilometresdeepthere.Thehighestmountainintheworldisabout9kilometreshigh.Ifthatmountainwasputintotheseaatthatplace,therewouldstillbe2kilometresofwateraboveit.Inmostpartofthesea,therearelotsofplants.Somelivenearthetopofthesea,otherslivedeepdown.Therearealsoalotofsmalllivingthings.Lotsoffishlivebyeatingthem.Theseacanbeverycold.Whenpeoplegodown,theseabecomescolderandcolder.Onlysomemencangodownintodeepsea.Butin1970,fivewomenscientistsliveinthedeepseaforfourteendays.2、根据实际情况回答问题。3、根据提示说话。假如你是李华，你向全班同学介绍上周星期六与好朋友刘军一起去参观了广州动物园，你们看到了很多动物，玩得很高兴。请用至少六句话来描述。二、找出上面短文中的形容词和副词，并且试试说出它们的用法。精讲部分一.形容词和副词在使用时都有三个级别：原级、比较级、最高级。例：(smallsmallersmallest)(talltallertallest)(hardharderhardest)比较级和最高级的构成有规则和不规则的变化两种1．规则变化单音节词和少数双音节词，在词尾加-er，-est来构成比较级和最高级。多音节词，加more，most构成比较级和最高级构成法原级比较级最高级单音节词一般单音节词尾加-er，-estallgreatstrongtallergreaterstrongertallestgreateststrongest以不发音的e结尾的单音词，只加-r，-stnicelargelatenicerlargerlaternicestlargestlatest以一个辅音字母结尾的闭音节单音词，双写结尾的辅音字母再加-er，-estbighotfatbiggerhotterfatterbiggesthottestfattest双音节词以辅音字母+y结尾的双音节词，改y为i再加-er，-esteasybusyearlyeasierbusierearliereasiestbusiestearliest多音节词在前面加more,most来构成比较级和最高级importantbeautifulhappilymoreimportantmorebeautifulmorehappilymostimportantmostbeautifulmosthappily2.不规则变化原级比较级最高级goodwellbetterbestbadillworseworstOldolderoldestmuch,manymoremostLittlelessleastFarfarther/furtherfarthest/furthest二.形容词和副词的比较级和最高级的用法1．as+原级+as表示“与……一样”Thepaintingisasbeautifulasthatone．这幅画和那幅画一样漂亮。(形容词)Hesingsaswellashisteacher.他唱得和他的老师一样好。（副词）注意：在否定句中可用notas(so)+原级+as与……不一样，不及……例：Itisnotas(so)coldinShanghaiasinBeijinginwinter．冬天上海的天气没北京的天气冷。(形容词)Thegirldoesn’trunasquicklyastheboy.；女孩跑得不如男孩快。（副词）