比较级和最高级-PPT.ppt

比较级和最高级v专题：形容词，副词比较级、最高级(一)v1.形容词，副词比较级和最高级的概念。v形容词和副词可以靠改变形式来表示程度的不同。我们把这种变化形式叫做比较等级。要比较两个或两个以上的人或物时，就必须用形容词的比较级和最高级。v形容词、副词有三个级：原级(Positive Degree)，比较级(Comparative Degree)(Superlative Degree)。2写出下列词的反义词写出下列词的反义词tall-thin-long-funny-Sad-shortheavyshortserioushappy3形容词的比较级和最高级的构成方法：v单音节和少数双音节形容词、副词的规则变化情况：va.在原级的词尾加-er变为比较级，加-est变为最高级。v e.g.short(原级)-shorter(比较级)-shortest(最高级)v long(原级)-longer(比较级)-longest(最高级)vb.如原级以e结尾，则比较级只加-r，最高级只加-st。v e.g.large-larger-largest nice-nicer-nicestvc.如原级以“辅音字母+y”结尾，要将y改为i，再加-er，-est。v e.g.busy-busier-busiest easy-easier-easiestv d.原级以重读闭音节结尾，而且末尾只有一个辅音字母(不含字母组合er等)，要双写这个辅音字母，再加-er，-est。v e.g.fat-fatter-fattest big-bigger-biggest4v2.其他双音节词和多音节词都在前面加more,most构成比较级及最高级：v 原级 比较级 最高级 vimportant more important most important vdifficult more difficult most difficultinteresting more interesting most interesting vuseful more useful most useful 5v有几个形容词有特殊的比较级和最高级形式：v原级 比较级 最高级 vgood/well better bestvbad/ill worse worst vmany/much more most vlittle less least vfar farther/further farthest/furthestvold older/elder oldest/eldestv小贴士:要注意有几个形容词的比较级和最高级有两种不同的形式，它们的意思也不同。ve.g.old-older较旧，较老-oldest最旧，最老/old-elder较年长-eldest最年长v far-farther较远-farthest最远(指距离)/far-further进一步-furthest最深(指程度)6写出下列词的比较级形式写出下列词的比较级形式tallshortbigthincalmnice-tallershorterbiggerthinnercalmernicerhappy-easy-heavy-hot-clean-dirty-happiereasierheavierhottercleanerdirtier7大家学习辛苦了，还是要坚持继续保持安静继续保持安静8serious-beautiful-interesting-important-difficult-gooddelicious-More seriousmore beautifulmore interestingmore importantmore difficultbettermore delicious9写出下列词的最高级形式写出下列词的最高级形式tall-bad-friendly-little-old-tallestworstthe most friendlyleastoldest10v3.形容词比较级的用法和相关句型。v表示两者“相等”用“as+形容词原级+as+比较对象”。ve.g.He is as tall as his motherv English is as interesting as math.v表示“不如”或“不相等”用“not+asso+形容词原级+as+比较对象”。ve.g.It is not soas cold today as yesterdayv Jack is not so/as tall as Tom.v表示倍数，如“一半两倍/3倍4倍”等用“halftwicethreefourtimes+asas”结构。ve.g.I study twice as hard as youv This room is three times as large as that one.v用“形容词比较级+than引导的从句”进行两者的比较。ve.g.The earth is bigger than the moonv This dress is more expensive than that one.11v强调比较级超出比较程度时，形容词的比较级前可用much，far，a lot，no，a little，even，any,等状语来修饰。ve.g.My brother is much older than I.v This bike is far better than that one.v由and连接同一个形容词的两个比较级，可以表示“越来越”。ve.g.I think English is becoming more and more difficult.v用“the+比较级+the+比较级”，表示“越就越”。ve.g.The more you read，the more knowledge you will getv The less junk food you eat,the healthier you feel.12v比较级+of the two 表示两者中较的（比较级前加the）vJohn is the clever of the two boys.vOf the two boys,John is the clever.v最高级+of 或 in 表示中最的vEg:Jack is the tallest in their class.vChina is the largest one of all the Asian countries.(注意一定地域空间用in，一类事物范围内用0f)va+最高级表示“非常”，the+最高级表示“最”。vThis is a most difficult question.vThis is the most difficult question.13v比较要同类，在同一范围内，排除自身的方法用other，在不同的范围内，不用other.vShanghai is larger than any other city in China.=Shanghai is the largest city in China.vShanghai is larger than any city in Inida.14v1.My brother is two years _(old)than me.v2.Tom is as _(fat)as Jim.v3.-Is your sister _(young)than you?-Yesv4.Who is _(thin),you or Helen?Helen is.v5.Lucy is the_(good)student in our class.v6.Marys hair is as _(long)as Lucys.v7.Which is _(big),the sun,the moon or the earth?v8.Who is _(tall),Tom or Sam?v9.Fangfang is not as _(tall)as the other girls.v10.My friends are _(many)than _(she).练习：单选题fatyoungerthinnerbestlongthe biggest tallertallmoreolderhers15v三 单项选择。v1.Alan is_ than Linda.v A.tall B.taller C.tallest v2.-She is _ than her mother.v -Her mother is also beautiful.v A.beautiful B.beautifuler v C.more beautiful D.the most beautifulv3.-Do you always get up as _ as you brother?v -Not always.v A.earliest B.earlier C.the earliest D.earlyv4.He is _more beautiful than I.v A.too B.enough C.much D.veryBCDC16v5.This book is _ that one.vA.as better as B.as good as C.as best as v6.The earth is_ the moon.v -I also saw it on the newspaper.vA.as 49 times big as B.49 times as bigger asvC.49 times as big as D.as big as 49 timesv7.-It looks like that he is as _ as you.v -Oh,no.He is _ than I.vA.tall,a little tall B.taller,a little tall vC.tall,a little taller D.taller,a little tallerv8.-Thanks for taking care of the garden,it is becoming _.-You are welcome.vA.more beautiful and morevB.more beautiful and more beautifulvC.more and more beautifulBCCC17v9.The box is _ heavy.I cant move it.v A.much B.more C.enough D.toov10.Her brother is _ than she.v A.seven year older B.seven year older v C.seven years old D.seven years olderv11.The_you stand,the _ you can see.v A.high;far B.higher;farther v C.highest;farthest D.more higher;more fartherv12.You should study English hard,because its getting_ in our country.v A.more and more important v B.more important and more importantv C.importanter and importanter v D.important and importantDDBA18v13._you learn,_ you will learn.vA.harder,better vB.the harder,the goodvC.the harder,the better v15.Who is _ student in your class?v A.good B.better v C.best D.the bestCD19改错改错1.Lesson 9 is more easier than Lesson 10.2.My mother is younger than your.3.He is one of longest boys in his class.4.The boy doesnt draw much well.5.Betty is the youngest on the three girls.6.Mother is the busiest of my family.7.You can jump very higher on the moon than on the earth.yoursthe longestveryofinmuch20Do some exercises同义句转换同义句转换1.He is the tallest student in his class.He is _ _ _ _ student in his class.He is _ _ _ _ students in his class.2.Peter draws well,Lilei draws better.Lilei draws _ of the two.taller than any other taller than the otherbetter21D22