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TheComparativeandSuperlativeDegreesofAdjectives&Adverbs形容词、副词的比较级和最高级一、构成：1、单音节的形容词和副词的比较级和最高级在词尾加er和est:tall---taller---tallestfast---faster---fastest以e结尾的词只加r和st:nice---nicer---nicest以重读闭音节结尾而词尾只有一个辅音字母的词，先双写词尾的辅音字母再加er,est:big---bigger---biggest2、双音节的形容词分两种情况：以er,y或ly结尾的加er和est，注意y前是辅音字母的词要先把y改为i：clever---cleverer---cleverestheavy---heavier---heaviest以ful结尾的词在原级前面加more和most:careful---morecareful---mostcareful双音节的副词除了early外，其它都是在原级前面加more和most:quickly---morequickly---mostquicklyearly---earlier---earliest3、三个音节以上的形容词和副词都是在原级前面加more和most：important--moreimportant--mostimportantcarefully---morecarefully---mostcarefully4、不规则变化：good\well---better---bestbad\badly\ill---worse---worstlittle---less---leastmany\much---more---mostfar---farther---farthest二、用法：1、句型“比较级+than”用于一方超过另一方：1)HeistallerthanI.2)Herunsfasterthanyou.2、比较级可以被much,far,even,still,alot,alittle,abit等修饰：1)HeismuchtallerthanI.2)LessonThreeisalittlemoredifficultthanLessontwo.3)LessonThreeismoreimportantthanLessonTwo.3、句型“the+最高级+in\of”用于表示三个或三个以上的人或事物中，某一个超过其它几个：1)ThisistheoldestcinemainGuangzhou.2)Heisthetallestofalltheboys.3)LessonThreeisthemostimportantofthethreelessons.4)Herunsfastestofalltheboys.5)Meimeiworksmostcarefullyinherclass.（副词最高级前面的the往往省略。）4、句型“as+原级+as”表示双方程度相等，即“像……一样”。1)HeisastallasIam.2)HestudiesaswellasIdo.句型“notso(as)+原级+as”表示双方程度不相等，即“不如……那样”。1)I’mnotso(as)oldasyou.2)ShedoesnotstudysowellasIdo.5、表示逐渐增长用“比较级+and+比较级”:1)Theweatherisgettingcolderandcolder.2)Ourcitybecomesmoreandmorebeautiful.6、表示平衡增长用“the+比较级，the+比较级”:1)Themore,thebetter.2)Theharderyouwork,thebetterresultyouwillget.注意：1.Whoistaller,JohnorJenny?2.Whichcityisthemostbeautiful,Hangzhou,GuilinorBeijing?3.MaryistwoyearsolderthanI.4.TheYellowriveristhesecondlongestriverinChina.5.Heisthetallerofthetwo.用括号内形容词的适当形式填空：1.Theweatheris_______(fine)todaythanitwasyesterday.finer2.Londonis_____________(big)cityinBritain.thebiggest3.Thissentenceis______________(difficult)thanthatone.moredifficult4.Johnisnotas______(tall)asMike.tall5.Whichis_____________________(interesting),historyorphysics?moreinteresting6.Sheis_________(thin)thanherbrother.thinner7.Whichcityis___________________(beautiful),Hangzhou,GuilinorBeijing?themostbeautiful8.Thisfilmis________________(wonderful)thanthatone.morewonderful9.Thisexerciseis_________(easy)thanExerciseThree.easier10.Todayitisas________(cold)asyesterday.cold