英语中倍数的表达法及相关练习

1英语中倍数的表达法及相关练习“倍数”的表达方式总结Thehouserentisexpensive.I'vegotabouthalfthespaceIhadathomeandI'mpaying_______here.（2003上海）A.asthreetimesmuchB.asmuchthreetimesC.muchasthreetimesD.threetimesasmuch该题的正确答案为D.显然本题是在考查倍数的表达法。倍数表达法是高中英语教学的重点，也是历年的高考热点之一。下面对倍数的几种表达法作一归纳：一、用times表示倍数（一般限于包括基数在内三倍或三倍以上的数。表示两倍的数，一般用twice）。其句式有：(前三种为主)1.“…times＋形容词/副词的比较级＋than…”例如：LineABisthreetimeslongerthanlineCD.线段AB是（线段）CD的三倍长。Thishallisfivetimesbiggerthanourclassroom.这个大厅比我们的教室大5倍。Thisropeistwicelongerthanthatone．Thishallisfivetimesbiggerthanourclassroom．Thecarrunstwicefasterthanthattruck．2.“…times+as+形容词/副词的原级＋as…”例如：Thistableisthreetimesaslongasthatone.这张桌子是那张桌子的三倍长。Thisdictionaryisfivetimesasthickastheoneyouborrowedfromthelibrary.这本词典的厚度是你从图书馆借的那本（厚度）的5倍。AsiaisfourtimesaslargeasEurope亚洲的面积是欧洲的四倍。Thisbigstoneisthreetimesasheavyasthatone．这块大石头的重量是那一块的三倍。（这块石头比那块重二倍）Theplaneflewtentimesashighasthekite．那架飞机飞行高度是那个风筝的十倍。（高出九倍）3.“…times+the+名词（如：size，height，weight，length，width,age等）＋of…”例如：Theearthis49timesthesizeofthemoon.地球的体积是月球的49倍。Thisriveristhreetimesthedepthofthatone.这条河是那条河的三倍深。Thisstreetisfourtimesthelengthofthatstreet.这条街是那条街的四倍长。Thishillisfourtimestheheightofthatsmallone．这座山的高度是那座小山的四倍。（比那座小山高三倍）4.“…times+more＋名词＋than…”例如：Heearnsfivetimesmoremoneythanhedidtenyearsago.他现在挣的钱比十年前挣的多5倍。Therearetwicemorestudentsinourclassthanintheirs.2我们班的学生人数比他们班多两倍。5.“…times+asmany（或much）＋名词＋as…”例如：We'veproducedtwiceasmuchcottonthisyearas（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。）Hehasgotthreetimesasmanybooksashissister.他拥有的书的数量是他妹妹的3倍。6.“…times+what从句”例如：Thelengthoftheroadisfourtimeswhatitwasthreeyearsago.这条路的长度是三年前的4倍。Thepriceofthemeatistwicewhatitwaslastyear.肉价是去年的两倍。7.“…times+upon（或over）…”例如：Thesizeofthesunisamilliontimesoverthatoftheearth.太阳的体积比地球的体积大一百万倍。Heisthreetimesuponyourage.他的年龄是你的4倍（或：比你的年龄大3倍）。8.“…+by+…times”例如：Comparedwithlastyear，ourcoaloutputhasincreasedbythreetimes.与去年相比，我们的煤产量增长了3倍。Hisspeedisfasterthanminebyfourtimes.他的速度比我的快4倍。9.“…times+comparedwith＋被比较对象”例如：Thenumberofthestudentsinourschoolhasincreasedfourtimescomparedwith1980.我们学校的学生人数比1980年增加了4倍。10.“…times+thatof+被比较对象”例如：InthisworkshoptheoutputofJulywasthreetimesthatofJanuary.这个车间七月份的产量是元月份的3倍。二、用分数、百分数表示倍数。例如：Theboxisone-thirdbiggerthanthatone.这个盒子比那个盒子大三分之一。Lastyeartheoutputvalueofindustrywas59percenthigherthanthatof1976.去年工业产值比1976年增长了59％。MycommandofEnglishisnothalfsogoodasyours.我英语掌握得还不及你的一半儿好。三、用again（一倍），double（两倍），triple（三倍），fourfold（四倍）等词表示倍数。例如：MyAuntisasoldagainasIam.我姑姑的年龄比我大一倍。Thetop-brandclothesareoftensoldasdoublethenormalpricehere.这里名牌衣服的售价经常比正常的售价高一倍。Thenewworkproceduretripledtheoutput.新工艺使产量增加两倍。Theoutputofgrainincreasedfourfold.粮食产量增加了三倍。［巩固练习］1.（2002上海春）Americanseat________vegetablesperpersontodayastheydidin1910.A.morethantwiceB.astwiceasmany3C.twiceasmanyasD.morethantwiceasmany2.（1998上海）Paperproducedeveryyearis_______theworld'sproductionofvehicles.A.thethreeweightofB.threetimestheweightofC.asthreetimesheavyasD.threetimesasheavieras(heavier应改为原级)3.（1994上海）WiththehelpoftheGermanexperts，thefactoryproduced______carsin1993astheyearbefore.A.astwicemanyB.asmanytwiceC.twiceasmanyD.twicemanyas4.（MET1992）Thisshipmeasures________thatone.A.astwiceaslongB.astwicelongasC.twicelongasD.twiceaslongas5.（MET1990）Afterthenewtechniquewasintroduced，thefactoryproduced_______tractorsin1988astheyearbefore.A.astwicemanyB.asmanyasC.astwiceasmanyD.twiceasmanyKey：1－5DBCDD6.ItisreportedthattheUnitedStatesuses________energyasthewholeofEurope.A.astwiceB.twicemuch4C.twicemuchasD.twiceasmuch答案是D7.Thehouserentisexpensive,I’vegotabouthalfthespaceIhadathomeandI’mpaying________here.(上海卷)A.asthreetimesmuchB.asmuchthreetimesC.muchasthreetimesD.threetimesasmuch【分析】答案选D。倍数threetimes要放在as的前面，后面省略asIpaidathome。8.WiththehelpoftheGermanexperts,thefactoryproduced________carsin1993astheyearbefore.(上海卷)A.astwicemanyB.asmanyastwiceC.astwiceasmanyD.twiceasmany【分析】答案选D。倍数放在as之前。此题与全国卷曾考过的一题几乎一样：