英语倍数表达法ppt课件

英语倍数表达法,1,一、用times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。,2,2.“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倍。,3,3.“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）,4,4.“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。Theheightofthishillisfourtimesthatofthatsmallone,5,5.“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。,6,6.“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。,7,7.“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）。,8,8.“+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。Comparedwithlastyear,ourcoaloutputhasincreasedbythreetimes.,9,二、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。,10,三、用again（一倍），double（两倍），triple（三倍），fourfold（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。,11,exercises,1.Americanseat_vegetableperpersontodayastheydidin1910.A.morethantwiceB.astwiceasmanyC.twiceasmanyasD.twiceasmuch,D,12,2.Paperproducedeveryyearis_theworldsproductionofvehicles.A.thethreeweightofB.threetimestheweightofC.asthreetimesheavyasD.threetimesasheavieras,B,13,3.WiththehelpoftheGermanexperts，thefactoryproduced_carsin1993astheyearbefore.A.astwicemanyB.asmanytwiceC.twiceasmanyD.twicemanyas,C,14,4.Thisshipmeasures_thatone.A.astwiceaslongB.astwicelongasC.twicelongasD.twiceaslongas,D,15,5.Afterthenewtechnique