倍数表达法附易错高考题 课件公开课一等奖省优质课大赛获奖课件

倍数表示法本课件尽可能搜集更多相关倍数表示法，也罗列一些易错题。（张Arthur整理）一、提分句型：表示“倍数必备句型”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十倍大。3．A＋is＋倍数＋times＋thesize(height,length...)＋of＋BTheirnewly­builtschoolisalmostfivetimesthesizeofours

whichwasbuilttenyearsago.Theirnewly­builtschoolisalmost

ourswhichwasbuilttenyearsago.Theirnewly­builtschoolisalmost

ours

whichwasbuilttenyearsago.他们新修建学校几乎是我们十年前修建学校两倍大。fivetimesasbigasfourtimesbiggerthan4.“…times+more＋名词＋than…”

Heearns

hedidtenyearsago.他现在挣钱比十年前挣多5倍fivetimesmoremoneythan5.“…times+asmany（或much）＋名词＋as…”比如：We'veproduced

thisyearas（wedid）tenyearsago.今年我们生产棉花比十年前多了一倍。（汉语中多一倍实际上也指两倍一样多。）twiceasmuchcotton6.“…times+what从句”比如：这条路长度是三年前4倍。Thelengthoftheroadisfourtimes

threeyearsago.whatitwas7.“…+by+…times”比如：Comparedwithlastyear，ourcoaloutputhasincreased

.与去年相比，我们煤产量增加了3倍。bythreetimes8.“比较级+than…+by+…times”比如：ThetimeIspentis

hespentbythreetimesmorethanthat我花费时间是他花费时间三倍9.“…times+thatof+被比较对象”比如：InthisworkshoptheoutputofJulywas3.5times

.这个车间七月份产量是元月份3.5倍。thatofJanuary10.“multiply+...times”和“bemultipliedby+...times”比如：1、thesalesofair-conditionershavebeenmultipliedbyfourtimessince。2.Theproductionhasmultipliedeighttimes自年以来，空调销售量增加了三倍.（是之前四倍）产量提升了7倍。（是以前8倍）二、注意事项1、两倍用twice/double.三倍及以上用...times.2、常见倍数也能够用分数、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。易错题集锦1、（上海春）Americanseat________vegetablesperpersontodayastheydidin1910.A.morethantwiceB.astwiceasmanyC.twiceasmanyasD.morethantwiceasmanyD。morethan/over/above+数字，是属于概数表示法一个。另外，此题考查as...as表示法，第二个as已经给出。2、Tenyearsagothepopulationofourvillagewas

thatoftheirs。（.陕西）A.astwicelargeasB.twiceaslargeasC.twiceasmuchasD.astwicemuchas答案B.本题关键是population修饰词用是large。1、表示人口\"多\"或\"少\",不用\"much\"或\"little\",而要用\"large\"或\"small\"。比如:Indiahasalargepopulation.印度人口众多。Singaporehasasmallpopulation.新加坡人口少。2、、问询某国、某地有多少人口时,不用\"Howmuch...?\",而用\"Howlarge...?\";在问详细人口时用\"What...?\"比如:-Howlargeisthepopulationofyourhometown?你们故乡有多少人口?--WhatisthepopulationofCanada?加拿大人口有多少?

3、Accordingtostatistics，amanis

todieofskincancerasawoman。A.morethantwiceaslikelyasB.twicemorethanaslikelyC.aslikelymorethantwiceD.twicemorethanlikelyas答案A.同第一题。4、(09四川19)Myuncle’shouseinthedowntownareaismuchsmallerthanours,butitistwice_______expensive.A.as B.so

C.too

D.very

答案A。考查as...as结构省略问题。5.（上海市六校届高三联考）Theladywassokeenonthefurcoatthatshewouldhaveboughtitevenifitcost__________A.astwicemuch B.muchastwice C.asmuchtwice D.twiceasmuch

答案D同题4.6、（甘肃省皋兰一中届高三上学期第三次月考）Eventhoughyouoffered_______youhavejustoffered,1wouldnotsellittoyou.A.themoneytwicethat B.twicethemoneythatC.twicethemoneywhat D.themoneythattwice

答案B。that引导定语从句。若选择c，去掉选项中money即可。7、（湖南省湘潭市凤凰中学届高三第六次月考）IrememberAlice,mylittleniece,oftenaskedquestionsthatchildren________wouldask.A.twicesooldasshe B.twiceasoldasherageC.oldertwicethanherage D.twiceofherage

答案D。若选择B，要去掉age。8．（安徽省两地届高三第一次联考）Muchtohissurprise，heinvitedonlytwentyfriendstothedinner，butcame．A．twiceasmanyasB．asmanyastwiceC．twiceasmanyD．twicemorethan

答案C。asas结构省略问题。第二个as为介词。9、（山西省平遥中学年9月高三高补摸底考试）---Whatdoesthemodelplanelooklike?---Well,thewingsoftheplaneare____ofitsbody.A.morethanthelengthtwice B.twicemorethanthelengthC.morethantwicethelength D.moretwicethanthelength

答案C10、（辽宁省本溪县届高三暑期补课阶段考试）---ItissaidthatthenumberofChinesecharactersyoucantypeonyourmobilephoneis____thetotalnumberofChinesecharacters.-