形容词、副词的比较级和最高级

形容词、副词的比较级和最高级明确形容词和副词的比较等级原级比较级最高级原级ThePositiveDegreeas……as结构Heisastallasme.Itisnotas/sogoodaswhatyousaid.Theboxistwiceasbigasthatone.比较级TheComparativeDegree最高级TheSuperlativeDegree1.词形变化2.常见用法变化规则规则变化1.一般在词尾+er,estrich—richer—richest2.以e结尾+r,stlarge—larger—largest3.以辅音字母+元音字母+辅音字母结尾，双写词尾+er,estbig—bigger—biggest4.以辅音字母+y结尾，变y为ier,iestdry—drier—driestshy—shyer/shier—shiest变化规则不规则变化good/wellbetterbestbad(ly)/illworseworstmany/muchmoremostlittlelessleastfarfarther/furtherfarthest/furthestoldolder/elderoldest/eldestlatelater/latterlatest/last常见用法1.单独使用Areyoufeelingbettertoday?2.表示“比…更…”用“比较级+than”引导的状语从句TheweatherinBeijingiscolderthanthatinhainan.否定用not+比较级+than或lessthanThisquestionislessdifficulty/notmoredifficultythanthatone.3.表示两者之间的比较时，在比较级前加theThelargerofthetwoislandsisBritain.4.修饰比较级①much,far,byfar,alittle,abit,slightly,alot,表示不定度量②even,still,yet,rather③倍数表示法表示确定度量Spacetravelwillbecomemuchcheaper.Isawthatalittlefurtheruptheroadthetrafficlightshadturnedred.Theboxistwicebiggerthanthatone.5.表示最高级含义①anyother+可数名词单数Bobistallerthananyotherboyintheclass.②any+可数名词单数NewYorkisbiggerthananycityinEuiope.③比较级+than+anyone/anythingelseZhouLanhadgainedmorepointsthananyoneelse.④比较级+than+(all/anyof)theothersTomworksharderthan(all/anyof)theothersinhisclass.6.双重比较betterandbettermoreandmorebeautiful7.the+比较级，the+比较级前一为状语从句后一为主句Theharderyoustudy,themoreprogressyouwillmake.Themorehaste,thelessspeed.最高级用法1.形容词最高级的前边要有the副词的最高级的前边可以没有如果有两个或者更多的形容词最高级则的一个加the后一个不加若是作表语的形容词，如果不是和别的人（事，物）比较，可以不加冠词Heisthebeststudentinourclass.Australiaisthelargestislandandsmallestcontinent.Fruitsarebestwhentheyarefresh.2.修饰最高级①序数词②much,byfar,about,nearly,almost,bynomeans.Africaisthesecondlargestcontinent.Sheisbyfarthemostactivestudentinourclass.Heisaboutthetalleststudentinourschool.Ofthethreeboys,Bobisalmost/nearlythecleverest.Thisisbynomeansthebestchoice.3.有时出现most,但并不是最高级的含义此时起一个强调的作用=veryItisamostusefulbook.4.被物主代词修饰时，前边不再加theChina'sbiggestcityisShanghai.Fishingishislatesthobby.5.最高级后可以不加名词Ofalltheanimals,theboyisthemostunmanageable.倍数表达法1.Ais倍数as+原级+asBAsiaisfourtimesaslargeasEurope.2.Ais倍数+比较级+BAsiaisthreetimeslargerthanEurope.3.Ais倍数+名词+ofB常见名词：thesize/weight/height/width/lengthThetableistwicethelengthofthedesk.4.Ais倍数+what从句Theproductionisnowthreetimeswhatitwasthreeyearsago.