倍數(shù)表達(dá)法及練習(xí)題

1、.For personal use only in study and research; not for commercial use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”This rope is twice longer than that one.這根繩是那根繩的三倍（比那根繩長兩倍）。The car runs twice faster than that truck.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

2、正好是B的多少倍”。Asia is four times as large as Europe.亞洲的面積是歐洲的兩倍。The plane flew ten times as high as the kite.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)+the size/ height/ length/ width，etc.+of”表示“A正好是B的多少倍”。This street is four times the length of that one.這條街是那條街的四倍長。This hill is four times the height of that small o

3、ne.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)）+thanThere 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里的書多五倍。We have produced twice more grain this year than we did last year.我們今年生產(chǎn)的糧食是去年的兩倍。2. times as many/much+名詞+asThere

4、is four times as much water in this pot as in that one.There are six times as many students as we expected.3. times over+被比對象，表示“增加倍”The grain output in that village is twice over that of 2002.4. times+that of+被比對象，表示“是倍”In this workshop，the output of July was 4.5 times that of January.5. times+comp

5、ared with+被比對象The number of the students in our school has increased 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+than+B”，表示“A比B大（長、高、寬等）多少倍”。如：This rope is twice longer than that one. 這根繩子是那根繩子的兩倍長（比那根

6、繩子長一倍）。This hall is five times bigger than our classroom. 這個大廳比我們的教室大四倍（是我們教室的五倍）。The car runs twice faster than 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+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：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

7、石頭的重量是那塊的三倍。The plane flew ten times as high as the kite. 那架飛機(jī)的飛行高度是那只風(fēng)箏的十倍。3. “A+倍數(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 length 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)的三個常規(guī)句型外，我們更要注意的是其常規(guī)句

8、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)或不可數(shù)）+than+被比對象”。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 than we did last year. 我們今年生產(chǎn)的糧食是去年的兩倍。2. “ times as many/much+名詞+as+被比對象”。如：There is four times as much water in t

9、his pot as in that one. 這個壺里裝的水是那個壺里的四倍。There are six times as many students as we expected. 學(xué)生數(shù)量是我們預(yù)期的六倍。3.“ times+over+被比對象”。如：The grain output in that village is twice over that of 2002. 那個村的糧食產(chǎn)量是2002年的兩倍。4. “ times+that+of+被比對象 ”。如：In this workshop， the output of July was 4.5 times that of Janua

10、ry. 這個車間7月份的產(chǎn)量是1月份的4.5倍。5. “times+compared with+被比對象”。如：The number of the students in our school has increased 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”。如：The production 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

11、象。如：Our factory s output of TV sets in the first six months of this year was 10% up compared with last year. 今年頭六個月我們廠電視機(jī)的產(chǎn)量與去年相比增加了10%.The industrial 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2001年增加了35%.三。 用double表示倍數(shù)1. double用作形容詞，表示“兩倍的”。如：The production is now do

12、uble what it was ten years ago. 現(xiàn)在的產(chǎn)量是十年前的兩倍。2. double用作動詞，表示“是的兩倍。如：The output has been 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，到2002年產(chǎn)量已經(jīng)比1980年翻了一番鞏固練習(xí) 1. Americans eat _ vegetables per person t

13、oday as they did in 1910. A. more than twice B. as twice as many C. twice as many as D. more than twice as many 2. Paper produced every year is _ the worlds production of vehicles. A. the three weight of B. three times the weight of C. as three times heavy as D. three times as heavier as3.With the h

14、elp of the German experts，the factory produced _ cars in 1993 as the year before. A. as twice many B. as many twice C. twice as many D. twice many as 4. This ship measures _ that one. A. as twice as long B. as twice long as C. twice long as D.twice as long as 5. After the new technique was introduce

15、d，the factory produced _ tractors in 1988 as the year before. A. as twice many B. as many as C. as twice as many D. twice as many 6. It is reported that the United States uses_energy as the whole of Europe. A.as twice B.twice much C.twice much as D.twice as much 7. The house rent is expensive, Ive g

16、ot about half the space I had at home and Im paying _ here. A. as three times much B. as much three times C. much as three times D. three times as much 8. With the help of the German experts, the factory produced _ cars in 1993 as the year before. A. as twice many B. as many as twice C. as twice as

17、many D. twice as many .僅供個人用于學(xué)習(xí)、研究；不得用于商業(yè)用途。For personal use only in study and research; not for commercial use.Nur fr den persnlichen fr Studien, Forschung, zu kommerziellen Zwecken verwendet werden.Pour l tude et la recherche uniquement des fins personnelles; pas des fins commerciales. , , . 以下無正文 僅供個人用于學(xué)習(xí)、