英语倍数表达法市公开课一等奖百校联赛获奖课件.pptx

英语倍数表示法第1页一、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.这棵树是那棵树三倍高。Hisfatheristwiceasoldashe.他父亲年纪有他两倍大。第2页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。第3页3.“A+be+倍数+the+计量名词+of+B”Thenewlybroadenedsquareisfourtimesthesizeofthepreviousone.新扩建广场是未扩建时四倍大。Thishillisfourtimestheheightofthatsmallone这座山高度是那座小山四倍。（比那座小山高三倍）第4页4.“The+计量名词+of+A+be+倍数+that+of+B”Thesizeofthenewlybroadenedsquareisfourtimesthatofthepreviousone.新扩建广场为以前四倍大。Theheightofthishillisfourtimesthatofthatsmallone第5页5.“times+asmany（或much）名词as”比如：Weveproducedtwiceasmuchcottonthisyearas（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。）Hehasgotthreetimesasmanybooksashissister.他拥有书数量是他妹妹3倍。第6页6.“times+what从句”比如：Thelengthoftheroadisfourtimeswhatitwasthreeyearsago.这条路长度是三年前4倍。Thepriceofthemeatistwicewhatitwaslastyear.肉价是去年两倍。第7页7.“times+upon（或over）”比如：Thesizeofthesunisamilliontimesoverthatoftheearth.太阳体积比地球体积大一百万倍。Heisthreetimesuponyourage.他年纪是你4倍（或：比你年纪大3倍）。第8页8.“+by+times”比如：Comparedwithlastyear，ourcoaloutputhasincreasedbythreetimes.与去年相比，我们煤产量增加了3倍。Hisspeedisfasterthanminebyfourtimes.他速度比我快4倍。Comparedwithlastyear,ourcoaloutputhasincreasedbythreetimes.第9页二、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年增加了59。MycommandofEnglishisnothalfsogoodasyours.我英语掌握得还不及你二分之一儿好。第10页三、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.我姑姑年纪比我大一倍。Thetop-brandclothesareoftensoldasdoublethenormalpricehere.这里名牌衣服售价经常比正常售价高一倍。Thenewworkproceduretripledtheoutput.新工艺使产量增加两倍。Theoutputofgrainincreasedfourfold.粮食产量增加了三倍。第11页exercises1.Americanseat_vegetableperpersontodayastheydidin1910.A.morethantwiceB.astwiceasmanyC.twiceasmanyasD.twiceasmuchD第12页2.Paperproducedeveryyearis_theworldsproductionofvehicles.A.thethreeweightofB.threetimestheweightofC.asthreetimesheavyasD.threetimesasheavierasB第13页3.WiththehelpoftheGermanexperts，thefactoryproduced_carsin1993astheyearbefore.A.astwicemanyB.asmanytwiceC.twiceasmanyD.twicemanyasC第14页4.Thisshipmeasures_thatone.A.astwiceaslongB.astwicelongasC.twicelongasD.twiceaslongasD第15页5.Afterthenewtechniquewasintroduced，thefactoryproduced_tractorsin1988astheyearbefore.A.astwicemanyB.asmanyasC.astwiceasmanyD.twiceasmanyD第16页