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1、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He is as tall as me.It is not as/so good as what you said.The box is twice as big as that one.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
2、,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/e
3、ldestlatelater/latterlatest/last常见用法1.单独使用Are you feeling better today?2.表示“比…更…”用“比较级+than”引导的状语从句The weather in Beijing is colder than that in hainan.否定用not+比较级+than或less thanThis question is less difficulty/not more difficulty than that one.3.表
4、示两者之间的比较时，在比较级前加theThe larger of the two islands is Britain.4.修饰比较级①much,far,byfar,a little,abit,slightly,alot,表示不定度量②even,still,yet,rather③倍数表示法表示确定度量Space travel will become much cheaper.I saw that a little further up the road the traffic lights had turned red.Th
5、e box is twice bigger than that one.farbyfarfar修饰比较级时,放在比较级的前边byfar修饰比较级时，放在比较级的后边；若放在前边，则要在比较级之间加theSheisfartallerthanhersister.Sheistallerbyfarthanhersister.Sheisbyfarthetallerofthemtwo.5.表示最高级含义①anyother +可数名词单数Bob is taller than any other boy in the class.②a
6、ny +可数名词单数New York is bigger than any city in Euiope.③比较级+than+anyone/anything elseZhou Lan had gained more points than anyone else.④比较级+than+(all/any of)the othersTom works harder than (all/any of)the others in his class.6.双重比较better and bettermore and more beau
7、tiful7.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He is the best student in our class.Australia is the largest
8、island and smallest continent.Fruits are best when they are fresh.2.修饰最高级①序数词②much ,by far,abo
