英語中倍數(shù)的表達法及相關練習

1、英語中“倍數(shù)”的表達方式有這樣一道題：The house rent is expensive. I've got about half the space I had at home and I'm paying _ here. （ 上海）A. as three times muchB. as much three timesC. much as three timesD. three times as much該題的正確答案為 D .顯然本題是在考查倍數(shù)的表達法。倍數(shù)表達法是高中英語教學的重點，也是歷年的高考熱點之一。掌握倍數(shù)的表達法對于同學們學好英語具有重要意義。下面對倍數(shù)

2、的幾種表達法作一歸納：一、用 times 表示倍數(shù)（一般限于包括基數(shù)在內(nèi)三倍或三倍以上的數(shù)。表示兩倍的數(shù)，一般用 twice ）。其句式有：(前三種為主)1. “ times 形容詞 / 副詞的比較級 than ”例如：Line AB is three times longer than line CD.線段 AB 是（線段） CD 的三倍長。This hall is five times bigger than our classroom.這個大廳比我們的教室大 5 倍。This rope is twice longer than 

3、that oneThis hall is five times bigger than our classroomThe car runs twice faster than that truck2. “ times +as + 形容詞 / 副詞的原級 as ”例如：This table is three times as long as that one.這張桌子是那張桌子的三倍長。This dictionary is five ti

4、mes as thick as the one you borrowed from the library.這本詞典的厚度是你從圖書館借的那本（厚度）的 5 倍。Asia is four times as large as Europe 亞洲的面積是歐洲的四倍。 This big stone is three times as heavy as that one這塊大石頭的重量是那一塊的三倍。（這塊石頭比那塊重二倍） The&

5、#160;plane flew ten times as high as the kite那架飛機飛行高度是那個風箏的十倍。（高出九倍） 3. “ times + the + 名詞（如： size， height， weight， length， width, age等） of ”例如：The earth is 49 times the size of the moon.地球的體積是月球的 49 倍。This river is three times the depth of that one.這條河是那條河的三倍

6、深。This street is four times the length of that street.這條街是那條街的四倍長。 This hill is four times the height of that small one這座山的高度是那座小山的四倍。（比那座小山高三倍）4. “ times + more 名詞 than ”例如：He earns five times more money

7、than he did ten years ago.他現(xiàn)在掙的錢比十年前掙的多 5 倍。There are twice more students in our class than in theirs.我們班的學生人數(shù)比他們班多兩倍。5. “ times +as many （或 much ）名詞 as ”例如：We've produced twice as much cotton this year as （ we did ） ten years ago.今年我們生產(chǎn)的棉花比十年前多了一倍。（漢語中的多一倍實際上也指兩倍一樣多。）He has got three times as m

8、any books as his sister.他擁有的書的數(shù)量是他妹妹的 3 倍。6. “ times + what 從句”例如：The length of the road is four times what it was three years ago.這條路的長度是三年前的 4 倍。The price of the meat is twice what it was last year.肉價是去年的兩倍。7.  “ times + up on （或 over ）”例如：The size of the sun is a million times over that of t

9、he earth.太陽的體積比地球的體積大一百萬倍。He is three times up on your age.他的年齡是你的 4 倍（或：比你的年齡大 3 倍）。8. “ +by + times ”例如：Compared with last year， our coal output has increased by three times.與去年相比，我們的煤產(chǎn)量增長了 3 倍。His speed is faster than mine by four times.他的速度比我的快 4 倍。9. “ times + compared with 被比較對象”例如：The number

10、of the students in our school has increased four times compared with 1980.我們學校的學生人數(shù)比 1980 年增加了4倍。10. “ times + that of + 被比較對象”例如：In this workshop the output of July was three times that of January.這個車間七月份的產(chǎn)量是元月份的 3 倍。二、用分數(shù)、百分數(shù)表示倍數(shù)。例如：The box is one-third bigger than that one.這個盒子比那個盒子大三分之一。Last yea

11、r the output value of industry was 59 percent higher than that of 1976.去年工業(yè)產(chǎn)值比 1976 年增長了 59 。My command of English is not half so good as yours.我英語掌握得還不及你的一半兒好。三、用 again （一倍）， double （兩倍）， triple （三倍）， fourfold （四倍）等詞表示倍數(shù)。例如：My Aunt is as old again as I am.我姑姑的年齡比我大一倍。The top-brand clothes are often

12、 sold as double the normal price here.這里名牌衣服的售價經(jīng)常比正常的售價高一倍。The new work procedure tripled the output.新工藝使產(chǎn)量增加兩倍。The output of grain increased fourfold.糧食產(chǎn)量增加了三倍。鞏固練習1. （上海春） Americans eat _ vegetables per person today as they did in 1910.A. more than twiceB. as twice as manyC. twice as many asD. mor

13、e than twice as many2. （上海） Paper produced every year is _ the world's production of vehicles.A. the three weight ofB. three times the weight ofC. as three times heavy asD. three times as heavier as(heavier應改為原級)3. （ 1 上海） With the help of the German experts， the factory produced _ cars in 1993

14、as the year before.A. as twice many B. as many twiceC. twice as many D. twice many as4. （ MET ） This ship measures _ that one.A. as twice as longB. as twice long asC. twice long asD. twice as long as5. （ MET ） After the new technique was introduced， the factory produced _ tractors in 1988 as the yea

15、r before.A. as twice manyB. as many asC. as twice as manyD. twice as manyKey： 1 5 DBCDD6. It is reported that the United States uses_energy as the whole of Europe.A.as twiceB.twice muchC.twice much asD.twice as much答案是D7. The house rent is expensive, Ive got about half the space I had at home and Im paying _ here. (上海卷)A. as three times muchB. as much three timesC. much as three timesD. three times as much【分析】答案選D。倍數(shù)three time