《英语倍数表达法》PPT课件.ppt

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1、英语倍数表达法一、用一、用 times 表示倍数表示倍数1.“A+be+倍数+as+计量形容词原级+as+B”。Thistreeisthreetimesastallasthatone.这棵树是那棵树的三倍高。Hisfatheristwiceasoldashe.他父亲的年纪有他两倍大。2.“A+be+倍数+计量形容词比较级+than+B”TheYangtzeRiverisalmosttwicelongerthanthePearlRiver.长江差不多比珠江长两倍。Thedictionaryisexactlyfivetimesmoreexpensivethanthatone.这本字典比那本恰好贵5

2、倍。3.“A+be+倍数+the+计量名词+of+B”Thenewlybroadenedsquareisfourtimesthesizeofthepreviousone.新扩建的广场是未扩建时的四倍大。Thishillisfourtimestheheightofthatsmallone这座山的高度是那座小山的四倍。（比那座小山高三倍）4.“The+计量名词+of+A+be+倍数+that+of+B”Thesizeofthenewlybroadenedsquareisfourtimesthatofthepreviousone.新扩建的广场为以前的四倍大。Theheightofthishillis

3、fourtimesthatofthatsmallone5.“times+asmany（或much）名词as”例如：Weveproducedtwiceasmuchcottonthisyearas（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。Thepr

4、iceofthemeatistwicewhatitwaslastyear.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。Hisspeedisfasterthanmin

5、ebyfourtimes.他的速度比我的快4倍。Comparedwithlastyear,ourcoaloutputhasincreasedbythreetimes.二、用分数、百分数表示倍数二、用分数、百分数表示倍数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

6、、用三、用 again（一倍），（一倍），double（两倍），（两倍），triple（三倍），（三倍），fourfold（四倍）等词表示倍数（四倍）等词表示倍数。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。exercises1.A

7、mericanseat_vegetableperpersontodayastheydidin1910.A.morethantwiceB.astwiceasmanyC.twiceasmanyasD.twiceasmuchD2.Paperproducedeveryyearis_theworldsproductionofvehicles.A.thethreeweightofB.threetimestheweightofC.asthreetimesheavyasD.threetimesasheavierasB3.WiththehelpoftheGermanexperts，thefactoryprodu

8、ced_carsin1993astheyearbefore.A.astwicemanyB.asmanytwiceC.twiceasmanyD.twicemanyasC4.Thisshipmeasures_thatone.A.astwiceaslongB.astwicelongasC.twicelongasD.twiceaslongasD5.Afterthenewtechniquewasintroduced，thefactoryproduced_tractorsin1988astheyearbefore.A.astwicemanyB.asmanyasC.astwiceasmanyD.twiceasmanyD