倍數(shù)表達(dá)法及練習(xí)題

1、1當(dāng)我們要表達(dá)甲是乙的幾倍時(shí)，通常用下面三個(gè)句型來表示：1.“倍數(shù)+形容詞（或副詞）的比較級(jí)+than+從句”表示“ A 比 B 大（長、高、寬等）多少倍”This rope is twice Ion ger than that o ne 這根繩是那根繩的三倍（比那根繩長兩倍）。The car runs twice faster than that trucks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(jí)+as+從句”表示“ A 正好是 B 的多少倍”。Asia is four times as large as Europ 亞洲的面積是歐洲的兩倍。

2、The plane flew ten times as high as the kite.架飛機(jī)的飛行高度是那個(gè)風(fēng)箏的 十倍（高出九倍）3.“倍數(shù) +the size/ height/ length/ width, etc.+of”表示 “A 正好是 B 的多少倍”。This street is four times the len gth of that o ne 這條街是那條街的四倍長。This hill is four times the height of that smallone 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(gè)常規(guī)句型外，我們更要注意的是其常規(guī)句型

3、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)）+thanThere are five times more books in our library than inyours 我們圖書館里的書比你們圖書館里的書多五倍。We have produced twice more grain this year than we did lastyear.我們今年生產(chǎn)的糧食是去年的兩倍。2.times as many/much+名詞 +asThere is four times as much water in this pot as in that one.2T

4、here are six times as many stude nts as we expected.3. times over+被比對(duì)象，表示“增加.倍”The grain output in that village is twice over that of 2002.4. times+that of+被比對(duì)象，表示“是.倍”In this workshop, the output of July was 4.5 times that of January.5. times+compared with+被比對(duì)象The nu mber of the stude nts in our sc

5、hool has in creased 4 times compared with 1980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The production is now three times what it was ten years ago1.“A+倍數(shù)+形容詞或副詞的比較級(jí)+than+B”，表示“A比 B 大（長、高、寬 等）多少倍”。如：This rope is twice Ion ger tha n that one.這根繩子是那根繩子的兩倍長（比那根繩子長一倍）。This hall is five times bigger tha n o

6、ur classroom.這個(gè)大廳比我們的教室大四倍（是我們教室的五倍）。The car runs twice faster tha n that truck.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+咅數(shù)+as+形容詞或副詞的原級(jí)+as+B,表示“A正好是B的多 少倍”。如：Asia is four times as large as Europe.亞洲的面積是歐洲的四3倍。4This big stone is three times as heavy as that one.這塊大石頭的重量是那塊的三倍。The pla ne flew ten times as hig

7、h as the kite.那架飛機(jī)的飛行高度是那只風(fēng)箏的十倍。3.“A+咅數(shù) +the size/height/length/width， etc+of+B ”，表示“A正好是 B 的多少倍”。如：This street is four times the len gth of that one.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。除掌握倍數(shù)表達(dá)的三個(gè)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)

8、或不可數(shù)）+than+被比對(duì)象”。如:There are five times more books in our library than in yours.我們圖書館里的書比你們圖書館多四倍。We have produced twice more grain this year tha n we did last year.我們今年生產(chǎn)的糧食是去年的兩倍。2.“ . times as ma ny/much+ 名詞 +as+被 比對(duì)象”。如：There is four times as much water in this pot as in that one.這個(gè)壺里裝的水是那個(gè)壺里的四倍

9、。There are six times as many stude nts as we expected.學(xué)生數(shù)量是我們預(yù)期的六倍。3.“ .times+over+ 被比對(duì)象”。如：5The grain output in that village is twice over that of 2002. 那個(gè)村的糧食產(chǎn)量是的兩倍。4.“ . times+that+of+ 被比對(duì)象”。如：6In this workshop , the output of July was 4.5 times that of January.這個(gè)車間 7 月份的產(chǎn)量是 1 月份的 4.5 倍。5.“.times

10、+compared with+ 被比對(duì)象”。如：The nu mber of the stude nts in our school has in creased 4 time s comparedwith 1980.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”。如：The product ion is now three times what it was ten years ago.現(xiàn)在的產(chǎn)量比十年前增加了兩倍。二。 倍數(shù)/ 百分?jǐn)?shù)（percent）+compared with/up on + 被比對(duì)象。如：Our factory s output

11、of TV sets in the first six mon ths ofthis year was 10% up compared with last year.今年頭六個(gè)月我們廠電視機(jī)的產(chǎn)量與去年相比增加了 10%.The in dustrial output of last year in our factory was 35% up on that of 2001.我們廠去年的工業(yè)產(chǎn)量比增加了 35%.三。 用 double 表示倍數(shù)1. double 用作形容詞，表示“兩倍的”。如：The product ion is now double what it was ten year

12、s ago.現(xiàn)在的產(chǎn)量是十年前的兩倍。2. double 用作動(dòng)詞，表示“是. 的兩倍。如：The output has bee n doubled in the past six years.在過去六年中產(chǎn)量已經(jīng)翻了一番。This brought a steady rise in the grain yield. In 2002 it nearly doubled that of 1980.這使糧食產(chǎn)量不斷增長，至 U 產(chǎn)量已經(jīng)比 1980 年翻了一番鞏固練習(xí)71.America ns eat_ vegetables per pers on today as they did in 1910

13、.A. more than twice B. as twice as many C. twice as many as D. more than twice asmany82.Paper produced every year is _ the worlds production of vehicles.A. the three weight ofB. three times the weight ofC. as three times heavy as D. three times as heavier as3._ Withthe help of the German experts，the

14、 factory produced _ carsin 1993 as the year before.A. as twice many B. as many twice C. twice as many D. twice many as4. This ship measures _ that one.A. as twice as long B. as twice long as C. twice long as D.twice as long as5. After the new technique was introduced，the factory produced _tractors i

15、n 1988 as the year before.A. as twice many B. as many as C. as twice as many D. twice as many6. It is reported that the United States uses_ energy as the wholeof Europe.A.as twice B.twice much C.twice much as D.twice as much7. The house rent is expensive, Ive got about half the space I had athome and Im paying _ here.A. as three times