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倍数表达法本课件尽量收集更多的相关的倍数表达法，也罗列一些易错题。（张Arthur整理）返回一、提分句型：表示“倍数的必备句型”1．A＋is＋倍数＋times＋比较级＋than＋BThetrainrunssixtimesfasterthantheboat.2．A＋is＋倍数＋times＋as＋原级＋as＋BThisgardenistentimesaslargeasthatone.火车比轮船快六倍。这个花园是那个花园的十倍大。返回3．A＋is＋倍数＋times＋thesize(height,length...)＋of＋BTheirnewlybuiltschoolisalmostfivetimesthesizeofourswhichwasbuilttenyearsago.Theirnewlybuiltschoolisalmostourswhichwasbuilttenyearsago.Theirnewlybuiltschoolisalmostourswhichwasbuilttenyearsago.他们新修建的学校几乎是我们十年前修建的学校的两倍大。fivetimesasbigasfourtimesbiggerthan返回4.“…times+more＋名词＋than…”Heearnshedidtenyearsago.他现在挣的钱比十年前挣的多5倍fivetimesmoremoneythan返回5.“…times+asmany（或much）＋名词＋as…”例如：•We'veproducedthisyearas（wedid）tenyearsago.今年我们生产的棉花比十年前多了一倍。（汉语中的多一倍实际上也指两倍一样多。）twiceasmuchcotton返回•6.“…times+what从句”例如：•这条路的长度是三年前的4倍。•Thelengthoftheroadisfourtimesthreeyearsago.whatitwas返回•7.“…+by+…times”例如：•Comparedwithlastyear，ourcoaloutputhasincreased.•与去年相比，我们的煤产量增长了3倍。bythreetimes返回•8.“比较级+than…+by+…times”•例如：•ThetimeIspentishespentbythreetimesmorethanthat我花费的时间是他花费时间的三倍返回•9.“…times+thatof+被比较对象”例如：•InthisworkshoptheoutputofJulywas3.5times.•这个车间七月份的产量是元月份的3.5倍。thatofJanuary返回•10.“multiply+...times”和“bemultipliedby+...times”例如：•1、thesalesofair-conditionershavebeenmultipliedbyfourtimessince2002。•2.Theproductionhasmultipliedeighttimes自2002年以来，空调的销售量增加了三倍.（是之前的四倍）产量提高了7倍。（是以前的8倍）返回•二、注意事项•1、两倍用twice/double.三倍及以上用...times.•2、常见的倍数也可以用分数、百分数、或aquarter，ahalf等修饰。•试翻译：这个盒子比那个大三分之一。Theboxisonethirdtimesbiggerthanthatone。返回易错题集锦1、（2002上海春）Americanseat________vegetablesperpersontodayastheydidin1910.A.morethantwiceB.astwiceasmanyC.twiceasmanyasD.morethantwiceasmanyD。morethan/over/above+数字，是属于概数表达法的一种。此外，此题考查as...as表达法，第二个as已经给出。返回2、Tenyearsagothepopulationofourvillagewasthatoftheirs。（2008.陕西）A.astwicelargeasB.twiceaslargeasC.twiceasmuchasD.astwicemuchas答案B.本题的关键是population的修饰词用的是large。1、表示人口的\多\或\少\,不用\much\或\little\,而要用\large\或\small\。例如:Indiahasalargepopulation.印度人口众多。Singaporehasasmallpopulation.新加坡人口少。2、、询问某国、某地有多少人口时,不用\Howmuch...?\,而用\Howlarge...?\;在问具体人口时用\What...?\例如:-Howlargeisthepopulationofyourhometown?你们家乡有多少人口?--WhatisthepopulationofCanada?加拿大的人口有多少?返回3、Accordingtostatistics，amanistodieofskincancerasawoman。A.morethantwiceaslikelyasB.twicemorethanaslikelyC.aslikelymorethantwiceD.twicemorethanlikelyas答案A.同第一题。返回4、(09四川19)Myuncle’shouseinthedowntownareaismuchsmallerthanours,butitistwice_______expensive.A.asB.soC.tooD.very答案A。考查as...as结构的省略问题。返回5.（上海市六校2010届高三联考）Theladywassokeenonthefurcoatthatshewouldhaveboughtitevenifitcost__________A.astwicemuchB.muchastwiceC.asmuchtwiceD.twiceasmuch答案D同题4.返回6、（甘肃省皋兰一中2010届高三上学期第三次月考）Eventhoughyouoffered_______youhavejustoffered,1wouldnotsellittoyou.A.themoneytwicethatB.twicethemoneythatC.twicethemoneywhatD.themoneythattwice答案B。that引导的定语从句。若选择c，去掉选项中的money即可。返回7、（湖南省湘潭市凤凰中学2009届高三第六次月考）IrememberAlice,mylittleniece,oftenaskedquestionsthatchildren________wouldask.A.twicesooldassheB.twiceasoldasherageC.oldertwicethanherageD.twiceofherage答案D。若选择B，要去掉age。返回8．（安徽省两地2010届高三第一次联考）Muchtohissurprise，heinvitedonlytwentyfriendstothedinner，butcame．A．twiceasmanyasB．asmanyastwiceC．twiceasmanyD．twicemorethan答案C。asas结构的省略问题。第二个as为介词。返回9、（山西省平遥中学2009年9月高三高补摸底考试）---Whatdoesthemodelplanelooklike?---Well,thewingsoftheplaneare____ofitsbody.A.morethanthelengthtwiceB.twicemorethanthelengthC.morethantwicethelengthD.moretwicethanthelength答案C返回10、（辽宁省本溪县2010届高三暑期补课阶段考试）---ItissaidthatthenumberofChinesecharactersyoucantypeonyourmobilephoneis____thetotalnumberofChinesecharacters.---Iknow.Thatisbecausethecharacterinputsystemsaremadebyforeigncellphoneproducers.A.muchthan25percentB.25percentaslessasC.25percentlessthanD.25percentasmuch答案C。考查倍数+the+名词的用法。