2014年人教版新目标八年级下Unit7SectionA3课件（38页）.ppt

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1、Whatsthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?Its8,844.43metershigh.Itshigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?zxxkYes,Idid.ItsmucholderthantheUS.大多数形容词有三个级。大多数

2、形容词有三个级。1.原级原级:Structure:as.as.像像.一样一样e.g.TimisastallasTom.2.比较级比较级(用于两者之间的比较用于两者之间的比较):Structure：形容词比较级形容词比较级than.e.g.Thisboxisbiggerthanthatone.3.最高级最高级(用于三者或三者以上的比较用于三者或三者以上的比较):Structure:the+形容词的最高级形容词的最高级of/in.e.g.Tomistheheaviestinourclass.Heisthemostpopularinourschool.规则变化规则变化1)一般情况下，一般情况下，单音

3、节或双音节的形容单音节或双音节的形容词词/副词比较级副词比较级er，最高级最高级est。如。如:clevercleverercleverestfewfewerfewestsmallsmallersmallest等。等。2)以以e结尾的词结尾的词，比较级比较级r，最高级最高级st即可。即可。如：如：nicenicernicestcutecutercutestlargelargerlargest3)以以辅音字母辅音字母y结尾的结尾的变变y为为ier或或est如如:easyeasiereasiesthappyhappierhappiest再如：再如：early,busy,heavy,dirty,la

4、zy也如也如此。此。4)重读闭音节，单辅音结尾的，重读闭音节，单辅音结尾的，双写这双写这个辅音字母个辅音字母er或或est的词：的词：fatfatterfattestthinthinnerthinnesthothotterhottestredredderreddestwetwetterwettestbigbiggerbiggestzx。xk5)多音节和部分双音节的词多音节和部分双音节的词需要在形容词需要在形容词原级前原级前more构成构成比较级比较级，themost构构成成最高级最高级。如：。如：beautifulmorebeautifulthemostbeautiful又如又如:delici

5、ous,popular,important,interesting,expensive,creative双音节双音节的词如的词如:carefulmorecarefulthemostcarefulusefulmoreusefulthemostuseful少数单音节词少数单音节词也是这样，如：也是这样，如：pleasedmorepleasedthemostpleasedtiredmoretiredthemosttiredb)不规则变化：不规则变化：goodbetterbestwellbetterbestbadworseworstmany/muchmoremostfarfartherfarthest

6、(距离远距离远)farfurtherfurthest(程度深程度深)oldeldereldest(长幼长幼)oldolderoldest(年龄年龄)1.三者或三者以上相比，表示最高程度三者或三者以上相比，表示最高程度时，用时，用“the+最高级最高级”的结构表示。的结构表示。这种句式一般常有表示比较范围的这种句式一般常有表示比较范围的介介词短语词短语。例如：。例如：2.ZhangHuaisthetallestofthethree.3.Heworks(the)hardestinhisclass.2.最高级可被最高级可被序数词序数词以及以及much，byfar，nearly，almost，byno

7、means，notquite，notreally，nothinglike等词语所等词语所修饰。例如：修饰。例如：Thishatisbyfarmuchnearlyalmostnotnearlybynomeansnotquitenothinglikethebiggest.Howmuchdidthesecondmostexpensivehatcoat?3.表示表示“最高程度最高程度”的形容词，如的形容词，如excellent，extreme，perfect等，没有最高等，没有最高级，也不能用级，也不能用比较级比较级。4.形容词最高级修饰作表语或介词宾语的形容词最高级修饰作表语或介词宾语的名词、代词时

8、，被修饰的词往往省略。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作状语的副词最高级前可以不加定冠词定冠词。e.g.Ofalltheboyshecame(the)earliest.1.比较级考点比较级考点2.比较级修饰问题比较级修饰问题alittle,abit,even,still,much,alot,far等可修饰比较级。等可修饰比较级。3.e.g.TomisalittletallerthanJim.Thisbookismuchmoreinterestingthanthatone.同级比较同级比较e.g

9、.TheweatherinBeijingiscolderthanthatinXian.Ourschoolisbiggerthanyours.the+比较级比较级e.g.Lucyisthefatterofthetwogirls.“a/an+比较级比较级”表示表示“又一，再又一，再一一”e.g.Lilyhasadoll,butshewantsabiggerone.隐性比较（没有隐性比较（没有than的情况）的情况）e.g.Whorunsfaster,LucyorLily?Youdbettercomeearliernexttime.Heworkedhardlastterm,butheworkseve

10、nharderthisterm.越来越越来越.a.比较级比较级+and+比较级比较级b.b.the+比较级比较级+句子，句子，the+比较级比较级+句子句子c.e.g.Itsgettingcolderandcolder.Themoreyouexercise,thebetteryouare.2.最高级考点最高级考点说明：形容词的最高级前必须加说明：形容词的最高级前必须加the；副；副词的最高级前省略词的最高级前省略the。范围问题范围问题e.g.Tomisthetalleststudentintheclass.Springisthebestseasonoftheyear.“.之一之一”问题问题e

11、.g.Beijingisoneofthebiggestcitiesintheworld.“the+序数词序数词+最高级最高级”e.g.Ithinkheisthesecondtallestboyinhisclass.3.比较级和最高级的转换比较级和最高级的转换e.g.Tomisthetalleststudentintheclass.=Tomistallerthananyotherstudentintheclass.=Tomistallerthanalltheotherstudentsintheclass.=NootherstudentsaretallerthanTom.总结：总结：anyothe

12、r+名词单数名词单数theother+名词复数名词复数否定否定+比较级比较级=最高级最高级比较级比较级+极限极限=最高级最高级同级比较同级比较as+adj./adv.+ase.g.SheisasthinasLily.HewritesascarefullyasLinda.not+as/so+adj./adv.+ase.g.TonydidntrunsofastasCarter.1.Ourfamilyhasboughtacarsowecantravel_thanbefore.（2008陕西）陕西）A.mosteasilyB.lesseasilyB.C.easilyD.moreeasilyC.2.My

13、fathertoldmeastorylastnight.Itis_oneIveeverheard.（2009陕西）陕西）D.thefunniestB.funniestE.C.funnierD.thefunnierDA3.The_friendsyouhave,the_youwillbe.（2010陕西）陕西）A.more,happyB.many,happyC.more,happierD.many,happier4.Whenheheardacryforhelp,heranoutas_ashecould.（2011陕西）陕西）A.hardlyB.quicklyB.C.finallyD.slowlyC

14、B5.ThisplaceisnotbigenoughforLucysbirthdayparty.Weshouldfinda_one.（2012陕西）陕西）A.bigB.smallB.C.biggerD.smallerCFill in the blanks with the correct forms of the words in the box.bigmuchpopularlongoldhigh1.TheAmazonRiverisoneofthe_riversintheworld.Itsalittle_thantheYangtzeRiver.2.Qomolangmais8,844.43met

15、ers_.Itsoneofthemost_placesforseriousmountainclimbers.longestlongerhighpopular4a3.Nooceanintheworldisas_asthePacificOcean.4.AlthoughJapanis_thanCanada,itis_smaller.bigoldermuch太平洋太平洋n.大海；海洋大海；海洋Write two comparisons about two topics.Write true facts.Tworivers:_and_4bTheYangtzeRiverisalmostaslongasth

16、eAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeRiveristhelongestriverinChina.theYangtzeRivertheAmazonRiverTwocities:_and_1._.2._.Twoanimals:_and_1._.2._.Write five questions using comparisons.Then ask your partner your questions.1._2._3._4._5._4cWhatisthehighestbuildinginourcity?1.Sheis_t

17、han_.A.busier/usB.busier/weC.morebusy/usD.morebusy/we2.Janeis_thanBetty.A.lesstallerB.lesstallestC.lesstallD.notastall3.Chinais_countryintheworld.A.thethirdlargestB.thelargestthirdC.thethirdlargeD.athirdlargestBAA4.Whichis_seasoninBeijing?Ithinkitsautumn.A.goodB.betterC.bestD.thebest5.Whichis_,thesu

18、n,themoonortheearth?Themoonis.A.smallB.smallerB.C.smallestD.thesmallestDD6.IstudyEnglishas_asmybrother.A.hardB.harderC.hardest7.Whichis_,abicycleoracomputer?A.expensiveB.moreexpensiveC.themostexpensive8.TheYellowRiverisoneof_riversinChina.A.longB.longerC.thelongestABC1.Tomemorizetheimportantphrasesandsentences.2.Tomakesomesentencesusingasas,.timesthan,lessthan,morethan