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Unit7What'sthehighestmountainintheworld?(Thethirdperiod)—What’sthehighestmountainintheworld?—Qomolangma.—HowhighisQomolangma?—It’s8,844.43metershigh.It’shigherthananyothermountain.—Whichisthedeepestsaltlakeintheworld?—TheCaspianSeaisthedeepestofallthesaltlakes.—DidyouknowthatChinaisoneoftheoldestcountriesintheworld?—Yes,Idid.It’smucholderthantheUS.大多数形容词有三个级。1.原级:Structure:as...as...像..….一样e.g.MaryisastallasAlice.2.比较级(用于两者之间的比较):Structure:形容词比较级+than...e.g.Thisboxisbiggerthanthatone.3.最高级(用于三者或三者以上的比较):Structure:the+形容词的最高级+of/in...e.g.Alanisthetallestinourclass.Heisthemostpopularinourschool.规则变化1)一般情况下,单音节或双音节的形容词/副词比较级+er,最高级+est。如:clever—cleverer—cleverestshort—shorter—shortestsmall—smaller—smallest2)以e结尾的词,比较级+r,最高级+st即可。如:nice—nicer—nicestcute—cuter—cutestlarge—larger—largest3)以辅音字母+y结尾的变y为i+er或est如:easy—easier—easiesthappy—happier—happiest再如:early,busy,heavy,dirty,lazy也如此。4)重读闭音节,末尾只有一个辅音字母结尾的,双写这个辅音字母+er或est如:fat—fatter—fattestthin—thinner—thinnesthot—hotter—hottestred—redder—reddestwet—wetter—wettestbig—bigger—biggest5)多音节和部分双音节的词需要在原级前+more构成比较级,+most构成最高级。如:beautiful-morebeautiful-mostbeautiful又如:delicious,popular,important,creative,interesting,expensive,双音节的词如:careful-morecareful-mostcarefuluseful-moreuseful-mostuseful少数单音节词也是这样,如:pleased—morepleased—mostpleasedtired—moretired—mosttiredb)不规则变化:good/well—better—bestbad/badly—worse—worstmany/much—more—mostfar—farther—farthest(距离远)far—further—furthest(程度深)old—elder—eldest(长幼)old—older—oldest(年龄)1.三者或三者以上相比,表示最高程度时,用“the+最高级”的结构表示。这种句式一般常有in/of表示比较范围的介词短语。例如:Tomisthetallestofthethree.Heworks(the)hardestinhisclass.2.最高级可被序数词以及much,byfar,nearly,almost,bynomeans,notquite,notreally,nothinglike等词语所修饰。如:Thishatisbyfar/much/nearly/almost/notnearly/bynomeans/notquite/nothinglikethebiggest.WhatisthesecondlongestriverinChina?3.表示“最高程度”的形容词,如excellent,extreme,perfect等,没有最高级,也不能用比较级。4.形容词最高级修饰作表语或介词宾语的名词、代词时,被修饰的词往往省略。e.g.Heisthetallest(boy)inhisclass.5.作状语的副词最高级前可以不加定冠词。e.g.Ofalltheboyshecame(the)earliest.1.比较级考点①比较级修饰问题alittle,abit,even,still,much,alot,far等可修饰比较级。e.g.TomisalittletallerthanJim.Thisbookismuchmoreinterestingthanthatone.②同级比较e.g.TheweatherinBeijingiscolderthanthatinXi’an.Ourschoolisbiggerthanyours.③the+比较级e.g.Lucyisthefatterofthetwogirls.④“a/an+比较级”表示“又一,再一”e.g.Lilyhasadoll,butshewantsabiggerone.⑤隐性比较(没有than的情况)e.g.Whorunsfaster,LucyorLily?You’dbettercomeearliernexttime.Heworkedhardlastterm,butheworksevenharderthisterm.⑥越来越……a.比较级+and+比较级b.the+比较级+句子,the+比较级+句子a.e.g.It’sgettingcolderandcolder.Themoreyouexercise,thebetteryouare.2.最高级考点说明:形容词的最高级前必须加the;副词的最高级前省略the。①范围问题e.g.Tomisthetalleststudentintheclass.Springisthebestseasonoftheyear.②“……之一”问题e.g.Beijingisoneofthebiggestcitiesintheworld.③“the+序数词+最高级”e.g.Ithinkheisthesecondtallestboyinhisclass.3.比较级和最高级的转换e.g.Tomisthetalleststudentintheclass.=Tomistallerthananyotherstudentintheclass.=Tomistallerthanalltheotherstudentsintheclass.=NootherstudentsaretallerthanTom.总结:①anyother+名词单数theother+名词复数②否定+比较级=最高级比较级+极限=最高级同级比较①as+adj./adv.+ase.g.SheisasthinasLily.HewritesascarefullyasLinda.②not+as/so+adj./adv.+ase.g.Tonydidn’trunsofastasCarter.Thankyou!
本文标题:八年级下册八年级下Unit 7
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