倍數(shù)表達(dá)法及練習(xí)題

當(dāng)我們要表達(dá)甲是乙的幾倍時，通常用下面三個句型來表示：1.“倍數(shù)+形容詞（或副詞）的比較級+than+從句”表示“A比B大（長、高、寬等）多少倍”Thisropeistwicelongerthanthatone.這根繩是那根繩的三倍（比那根繩長兩倍）。Thecarrunstwicefasterthanthattruck.這輛小車的速度比那輛卡車快兩倍（是那輛卡車的三倍）。2.“倍數(shù)+as+形容詞或副詞的原級+as+從句”表示“A正好是B的多少倍”。AsiaisfourtimesaslargeasEurope.亞洲的面積是歐洲的兩倍。Theplaneflewtentimesashighasthekite.那架飛機(jī)的飛行高度是那個風(fēng)箏的十倍（高出九倍）3.“倍數(shù)+thesize/height/length/width，etc.+of…”表示“A正好是B的多少倍”。Thisstreetisfourtimesthelengthofthatone.這條街是那條街的四倍長。Thishillisfourtimestheheightofthatsmallone.這座山的高度是那座山的四倍（比那座山高三倍）除掌握倍數(shù)表達(dá)的三個常規(guī)句型外，我們更要注意的是其常規(guī)句型的變形及其特殊規(guī)律。一、常規(guī)句型的變形1.…times+more+名詞（可數(shù)，不可數(shù)）+than…Therearefivetimesmorebooksinourlibrarythaninyours.我們圖書館里的書比你們圖書館里的書多五倍。Wehaveproducedtwicemoregrainthisyearthanwedidlastyear.我們今年生產(chǎn)的糧食是去年的兩倍。2.…timesasmany/much+名詞+as…Thereisfourtimesasmuchwaterinthispotasinthatone.Therearesixtimesasmanystudentsasweexpected.3.…timesover+被比對象，表示“增加……倍”Thegrainoutputinthatvillageistwiceoverthatof2002.4.…times+thatof+被比對象，表示“是……倍”Inthisworkshop，theoutputofJulywas4.5timesthatofJanuary.5.…times+comparedwith+被比對象Thenumberofthestudentsinourschoolhasincreased4timescomparedwith1980.我們學(xué)校的學(xué)生人數(shù)比1980年增加了三倍。6.…times+what+從句Theproductionisnowthreetimeswhatitwastenyearsago1.“A+倍數(shù)+形容詞或副詞的比較級+than+B”，表示“A比B大（長、高、寬等）多少倍”。如：Thisropeistwicelongerthanthatone.這根繩子是那根繩子的兩倍長（比那根繩子長一倍）。Thishallisfivetimesbiggerthanourclassroom.這個大廳比我們的教室大四倍（是我們教室的五倍）。Thecarrunstwicefasterthanthattruck.這輛小車的速度比那輛卡車快一倍（是那輛卡車的兩倍）。2.“A+倍數(shù)+as+形容詞或副詞的原級+as+B”，表示“A正好是B的多少倍”。如：AsiaisfourtimesaslargeasEurope.亞洲的面積是歐洲的四倍。2.Paperproducedeveryyearis_______theworld'sproductionofvehicles.A.thethreeweightofB.threetimestheweightofC.asthreetimesheavyasD.threetimesasheavieras3.WiththehelpoftheGermanexperts，thefactoryproduced______carsin1993astheyearbefore.A.astwicemanyB.asmanytwiceC.twiceasmanyD.twicemanyas4.Thisshipmeasures________thatone.A.astwiceaslongB.astwicelongasC.twicelongasD.twiceaslongas5.Afterthenewtechniquewasintroduced，thefactoryproduced_______tractorsin1988astheyearbefore.A.astwicemanyB.asmanyasC.astwiceasmanyD.twiceasmany6.ItisreportedthattheUnitedStatesuses________energyasthewholeofEurope.A.astwiceB.twicemuchC.twicemuchasD.twiceasmuch7.Thehouserentisexpensive,I’vegotabouthalfthespaceIhadathomeandI’mpaying________here.A.asthreetimesmuchB.asmuchthreetimesC.muchasthreetimesD.threetimesasmuch8.WiththehelpoftheGermanexpe