倍数表达法及练习题

1、当我们要表达甲是乙的几倍时，通常用下面三个句型来表示：1. “倍数+形容词或副词的比拟级+than+从句表示“ A比B大长、高、 宽等多少倍This rope is twice Ion ger than that o n这根绳是那根绳的三倍比那根绳长两倍。The car runs twice faster than that true这辆小车的速度比那辆卡车快两倍 是那辆 卡车的三倍。2. “倍数+as+形容词或副词的原级+as+从句表示“ A正好是B的多少倍。Asia is four times as large as Europl洲 N的面积是欧洲的两倍。The pla ne flew t

2、en times as high as the k那架飞机的飞行高度是那个风筝的十倍 高出九倍3. “倍数 +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 on这条街是那条街的四倍长。This hill is four times the height of that smallone这座山的高度是那座山的四倍比那座山高三倍除掌握倍数表达的三个常规句型外，我们更要注意的是其常规句型的变形及其 特殊规律。一、常规句型的变形1. times

3、+more+名词可数，不可数 +tha nThere are five times more books in our library than inyours我们图书馆里的书比你们图书馆里的书多五倍。We have produced twice more grain this year tha n we did lastyear我们今年生产的粮食是去年的两倍。2. times as many/much+名词 +as There is four times as much water in this pot as in that one.There are six times as many

4、stude nts as we expected.3. times over+被比对象，表示“增加倍The grain output in that village is twice over that of 2002.4. times+that of+被比对象，表示“是倍In this workshop, the output of July was 4.5 times that of January.5. times+compared with+被 比对象The nu mber of the stude nts in our school has in creased 4 times co

5、mpared with 1980我们学校的学生人数比1980年增加了三倍, 6.times+what+从句The production is now three times what it was ten years ago1. “A+倍数+形容词或副词的比拟级+than+B，表示“A比B大长、高、宽等多少倍。如:This rope is twice Ion ger tha n that one.两倍长比那根绳子长一倍。这根绳子是那根绳子的This hall is five times bigger than our classroom.我们的教室大四倍是我们教室的五倍。这个大厅比The ca

6、r runs twice faster tha n that truck.辆卡车快一倍是那辆卡车的两倍这辆小车的速度比那2. “ A倍数+as+形容词或副词的原级+as+B ，表示“A正好是B的多 少倍。如：Asia is four times as large as Europe.亚洲的面积是欧洲的四倍。This big stone is three times as heavy as that one.这块大石头的重量是那块的三倍。The pla ne flew ten times as high as the kite.那架飞机的飞行高度是那只风筝的十倍。3. “ A倍数 +the si

7、ze/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.这条街是那条街的四倍长。This hill is four times the height of that small one.这座山的高度是那座小山的四倍。除掌握倍数表达的三个常规句型外，我们更要注意的是其常规句型的变 形及其特殊规律。一。常规句型的变形1.times+more+名词可数或不可数+than+被比对象。如:There are five times more books in ou

8、r library than in yours. 我们图书馆里的书比你们图书馆多四倍。We have produced twice more grain this year tha n we did last year.我们今年生产的粮食是去年的两倍。2. “ timesas many/much+名词 +as+被比对象。如:There is four times as much water in this pot as in that one.学生数量这个壶里装的水是那个壶里的四倍。There are six times as many stude nts as we expected.是我们

9、预期的六倍。3. “ times+over+被比对象。如：The grain output in that village is twice over that of 2002. 那个村的粮食产量是2002年的两倍。4. “ times+that+of+ 被比对象。如：In this workshop , the output of July was 4.5 times that of January.这个车间7月份的产量是1月份的4.5倍。5. “ times+compared with+ 被比对象。如：The nu mber of the stude nts in our school h

10、as in creased 4 time s compared with 1980.我们学校的学生人数比1980年增加了三倍。6.times+what从句。如:The product ion is now three times what it was ten years ago.现在的产量比十年前增加了两倍。二。倍数/ 百分数percent +compared with/up on + 被比对象。如：Our factory ' s output of TV sets in the first six mon ths ofthis year was 10% up compared wi

11、th last year.今年头六个月我们厂电视机的产量与去年相比增加了 10%.The in dustrial output of last year in our factory was 35% upon that of 2001. 我们厂去年的工业产量比 2001年增加了 35%.三。用double表示倍数1. double用作形容词，表示“两倍的。如：The product ion is now double what it was ten years ago.现在的产量是十年前的两倍。2. double用作动词，表示“是的两倍。如：The output has bee n doubl

12、ed in the past six years.在过去六年中产量已经翻了一番。This brought a steady rise in the grain yield. In 2002 it nearly doubled that of 1980.这使粮食产量不断增长，到2002年产量已经比1980年翻了一番稳固练习1. America ns eatvegetables per pers on today as they did in 1910.A. more than twice B. as twice as many C. twice as many as D. more than t

13、wice as many2. 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 as D. three times as heavier as3. With the help of the German expert，sthe factory produced cars in1993 as the year before.A. as twice many B. a

14、s many twice C. twice as manyD. 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 introduce，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 many6. It is reported that the United States usesenergy as the whole ofEurope.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 at home and I' m paying here.A. as three times muc