八年级英语下册 Unit 7 What’s the highest mountain in the world Section A 3课件 （新版）人教新目标版.ppt

Unit7,Unit7Whatsthehighestmountainintheworld?,SectionA3Grammarfocus4c,Grammarfocus,Whatsthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?Its8,844.43metershigh.Itshigherthananyothermountain.,Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.ItsmucholderthantheUS.,大多数形容词有三个级。1.原级:Structure:as.as.像.一样e.g.TimisastallasTom.2.比较级(用于两者之间的比较):Structure：形容词比较级than.e.g.Thisboxisbiggerthanthatone.,形容词和副词的比较级和最高级,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.Tomistheheaviestinourclass.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:clevercleverercleverestfewfewerfewestsmallsmallersmallest等。,形容词、副词的比较级和最高级规则变化和不规则变化,2)以e结尾的词，比较级r，最高级st即可。如：nicenicernicestcutecutercutestlargelargerlargest3)以辅音字母y结尾的变y为ier或est如:easyeasiereasiesthappyhappierhappiest再如：early,busy,heavy,dirty,lazy也如此。,4)重读闭音节，单辅音结尾的，双写这个辅音字母er或est的词：fatfatterfattestthinthinnerthinnesthothotterhottestredredderreddestwetwetterwettestbigbiggerbiggest,5)多音节和部分双音节的词需要在形容词原级前more构成比较级，themost构成最高级。如：beautifulmorebeautifulthemostbeautiful又如:delicious,popular,important,interesting,expensive,creative双音节的词如:carefulmorecarefulthemostcarefulusefulmoreusefulthemostuseful,少数单音节词也是这样，如：pleasedmorepleasedthemostpleasedtiredmoretiredthemosttiredb)不规则变化：goodbetterbestwellbetterbestbadworseworstmany/muchmoremost,farfartherfarthest(距离远)farfurtherfurthest(程度深)oldeldereldest(长幼)oldolderoldest(年龄),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。这种句式一般常有表示比较范围的介词短语。例如：ZhangHuaisthetallestofthethree.Heworks(the)hardestinhisclass.,最高级的用法,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。例如：Thishatisbyfarmuchnearlyalmostnotnearlybynomeansnotquitenothinglikethebiggest.Howmuchdidthesecondmostexpensivehatcoat?,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.,比较级考点比较级修饰问题alittle,abit,even,still,much,alot,far等可修饰比较级。e.g.TomisalittletallerthanJim.Thisbookismuchmoreinterestingthanthatone.,中考链接,同级比较e.g.TheweatherinBeijingiscolderthanthatinXian.Ourschoolisbiggerthanyours.the+比较级e.g.Lucyisthefatterofthetwogirls.,“a/an+比较级”表示“又一，再一”e.g.Lilyhasadoll,butshewantsabiggerone.隐性比较（没有than的情况）e.g.Whorunsfaster,LucyorLily?Youdbettercomeearliernexttime.Heworkedhardlastterm,butheworksevenharderthisterm.,越来越.比较级+and+比较级b.the+比较级+句子，the+比较级+句子e.g.Itsgettingcolderandcolder.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。范围问题e.g.Tomisthetalleststudentintheclass.Springisthebestseasonoftheyear.,“.之一”问题e.g.Beijingisoneofthebiggestcitiesintheworld.“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：anyother+名词单数theother+名词复数否定+比较级=最高级比较级+极限=最高级,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）mosteasilyB.lesseasilyC.easilyD.moreeasily2.Myfathertoldmeastorylastnight.Itis_oneIveeverheard.（2009陕西）thefunniestB.funniestC.funnierD.thefunnier,学以致用,D,A,3.The_friendsyouhave,the_youwillbe.（2010陕西）A.more,happyB.many,happyC.more,happierD.many,happier4.Whenheheardacryforhelp,heranoutas_ashecould.（2011陕西）hardlyB.quicklyC.finallyD.slowly,C,B,5.ThisplaceisnotbigenoughforLucysbirthdayparty.Weshouldfinda_one.（2012陕西）bigB.smallC.biggerD.smaller,C,Fillintheblankswiththecorrectformsofthewordsinthebox.,bigmuchpopularlongoldhigh,1.TheAmazonRiverisoneofthe_riversintheworld.Itsalittle_thantheYangtzeRiver.2.Qomolangmais8,844.43meters_.Itsoneofthemost_placesforseriousmountainclimbers.,longest,longer,high,popular,4a,3.Nooceanintheworldisas_asthePacificOcean.4.AlthoughJapanis_thanCanada,itis_smaller.,big,older,much,太平洋,n.大海；海洋,Writetwocomparisonsabouttwotopics.Writetruefacts.,Tworivers:_and_,e.g.,4b,TheYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeRiveristhelongestriverinChina.,theYangtzeRiver,theAmazonRiver,Twocities:_and_1._.2._.,Twoanimals:_and_1._.2._.,Writefivequestionsusingcomparisons.Thenaskyourpartneryourquestions.,Writing,1._2._3._4._5._,e.g.,4c,Whatisthehighestbuildinginourcity?,Exercises,1.Sheis_than_.A.busier/usB.busier/weC.morebusy/usD.morebusy/we2.Janeis_thanBetty.A.lesstallerB.lesstallestC.lesstallD.notastall3.Chinais_countryintheworld.A.thethirdlargestB.thelargestthirdC.thethirdlargeD.athirdlargest,B,A,A,4.Whichis_seasoninBeijing?Ithinkitsautumn.A.goodB.betterC.bestD.thebest5.Whichis_,thesun,themoonortheearth?Themoonis.smallB.smallerC.smallestD.thesmallest,D,D,6.IstudyEnglishas_asmybrother.A.hardB.harderC.hardest7.Whi