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大多数形容词和副词有三个等级：原级,即原形比较级,表示“较……”；“更……”最高级，表示“最……”的意思。Grammar形容词和副词的比较级构成的规则变化:1.单音节词和少数双音节词一般在词尾加—ereg.cold–colderold—older一、形容词的比较级变化形式2.重读闭音节词末尾只有一个辅音字母时,先双写这个辅音字母,再加-er.big–biggerthin–thinner3.以“辅音字母+y”结尾的双音节词，先改y为i,再加-er或-est。easy–easierhappy–happier4.多音节词和部分双音节词在词前加more。eg.delicious–moredeliciousinteresting–moreinterestingserious-moreserious构成的不规则变化:eg.good/well–betterbad/badly–worsemany/much–morelittle–lessfar–farther/further1.表示两者(人或事物)的比较。eg.IamtallerthanTom.Mydressismorebeautifulthanhers.二、形容词的比较级的用法2.在形容词比较级前还可用much,even,still,alittle来修饰,表示“…的多”,“甚至…”,“更…”,“…一些”。e.g.Thiscityismuchmorebeautifulthanbefore.She’salittlemoreoutgoingthanme.It’salittlecoldertoday.3.“比较级＋and＋比较级”意为“越来越…”。多音节比较级用“moreandmore＋形容词原级”形式。It’sgettingworseandworse.Thegroupbecamemoreandmorepopular.4.“Which/Whois+比较级…？”比较A、B两事物,问其中哪一个较…时用此句型。e.g.WhichT-shirtisnicer,thisoneorthatone?Whoismoreactive,MaryorKate?三、比较两者其他用法1.两者在某一方面相同基本句型“as+形容词或副词原形+as”e.g.Ithinkscienceisasimportantasmath.TomrunsasfastasJim.2.一方在某一方面不及对方基本句型“notas/so+形容词或副词原形+as”e.g.Heisnotas/sotallashisbrother.1.Jim’sbagis_________thanKate’s.A.biggerB.bigC.biggestD.thebigger2.Thatbookisnotso______asthisone.A.interestingB.moreinterestingC.mostinterestingD.themostinteresting3.Myshoesarecheaperthan________.A.youB.yourC.yoursD.youroneSelf-checkI.Multiplechoices4.Thisclassroomis__________thanthatone.A.manybigB.muchbigC.manybiggerD.muchbigger5.Doyoulook_______Tom?A.thesameasB.sameasC.thesameD.thesamesoSelf-checkI.Multiplechoices1.Hehas________(short)and________(curly)hairthanSam.2.Tomis____________(athletic)thanJimis.3.Isyourhobbythe_______(same)asmine?4.Hecanrunas______(fast)asI.5.Sheisa_______(little)heavierthanme.6.Heis_______(much)moreoutgoingthanme.Self-checkII.Fillintheblanksshortercurliermoreathleticsamefastlittlemuch