英语中如何表达倍数

1、英语中如何表达倍数1. 倍数 + as + 形容词或副词的原级 + as + 其他。这种结构又常演变成下列两类：倍数 + as + many + 可数名词复数 + as；倍数 + as +much + 不可数名词 + as。如：There are seven times as many people as I expected.是我预料的人数的七倍。There is five times as much coffee in this glass as in that one.这个杯子里的咖啡是那个杯子里的五倍。2. 倍数 + 形容词（或副词）的比较级 + than + 其他。如：The hal

2、l is five times bigger than our classroom. 这个大厅的面积比我们教室大五倍。3. 倍数 + the size / height / length / width. etc. + of + 其他。如：This road is six times the length of that one. 这条路是那条路的六倍长。4. 计量名词 + of + 名词 + be +倍数 + that + of + 其他。如：The size of the newly broadened square is four times that of the previous o

3、ne. 新扩建的广场为以前的四倍大。5. 倍数+what从句。如：The production is now three times what it was ten years ago.现在的产量是十年前的三倍。6. 倍数 + more + 名词 + than +其他。如：There are nine times more books in his bag than in yours.他书包里的书比你书包里的书多九倍。7. 其他表达。如：Shes twice/ double my age. 她的年龄是我的两倍。The average income of the staff has been i

4、ncreased by 50 percent compared with last year. 与去年相比，该单位职工的收入已增加了50%。He runs faster than me by three times. 他跑得比我快三倍。【考查方向】1)倍数在句中的位置一般放在第一个as前面或比较级前面或名词前面。2)用times表示倍数时，一般只限于表示包括基数在内的三倍或三倍以上的数。表示两倍可以用twice或double，一倍用once。 一、用times表示倍数（一般限于包括基数在内三倍或三倍以上的数。表示两倍的数, 一般twice。）。其句型有: 1. times形容词（副词）比较级t

5、han. This hall is five times bigger than our classroom. 这个大厅比我们的教室大五倍。（是我们教室的六倍大）The car runs twice faster than that truck. 这辆轿车的速度比那辆卡车快两倍。（是那辆卡车的三倍快）2. timesas形容词（或much）或副词原级as. The big box is four times as heavy as the small one. 大箱子是小箱子的四倍重。Asia is four times as large as Europe. 亚洲的面积是欧洲的四倍。Ten

6、is twice as much as five. 十是五的两倍。The plane flew ten times as high as the kite. 那架飞机飞行高度是那个风筝的十倍。（高出九倍）3. timesthe名词（size, height, weight, length, width）ofYour playground is 900 metres wide, three times the size of ours. 你们操场有900米宽, 是我们的三倍。This street is four times the length of that one. 这条大街是那条街的四倍

7、长。This big tree is four times the height of that small one. 这棵大树的高度是那棵小树的四倍。（比那棵小树高三倍）也可译成: The height of the big tree is four times that of that small one. 4. timesmore名词（可数, 不可数）than. There are four times more books in our library than in yours. 我们图书馆藏书（数量）是你们图书馆的四倍。（多三倍）We have produced twice mor

8、e grain this year than we did last year. 我们今年生产的粮食比去年增长一倍。（是去年的两倍）5. times as many（或much）名词其它There is three times as much water in this pot as in that one. 这个壶里的水（量）是那个壶里的三倍。There are five times as many students as we expected. 到的人是我们预计的五倍。6. timesover被比对象表示“增加倍”。如: The grain output in that village

9、was twice over that of 1978. 那个村的粮食产量比一九七八年的增加了两倍。7. timesthatof被比对象“是倍”。如: In this workshop, the output of July was 3. 5 times that of January. 这个车间七月份的产量是元月份的三点五倍。二、用. （percent, per cent）up on被比对象Altogether, more than 70 percent of the surface of our planet is covered by water. 我们地球的表面百分之七十以上被水覆盖。

10、Our factorys output of TV sets in 1998 was 400 up compared with 1980. 1998年我们工厂电视机的产量与1980年相比增长 400。The industrial output of last year in our factory was 250 up on that of 2000. 我们工厂去年的工业产量比2000年增加了 250。（或增加两倍半）三、用double表示倍数1. double作形容词, “两倍的”。如: The production is now double what it was ten years a

11、go. 现在的产量是十年前的两倍。2. double作动词, “是的两倍”。如: The output has been doubled in the past five years. 过去五年中产量翻了一番。其它表示法(1) 英语中有些词表示特定的倍数，again 一倍A equals B 一倍half as much again 一倍半double 两倍treble/triple 三倍quadruple 四倍quintuple 五倍sextuple 六倍septuple 七倍octuple 八倍nonuple 九倍decuple 十倍 (2) 使用by, compared with 等Co

12、mpared with last year， our coal output has increased by three times. 与去年相比，我们的煤产量增长了 3 倍。(使用by.)The number of the students in our school has increased four times compared with 1980.我们学校的学生人数比 1980 年增加了 3 倍。(使用 compared with) 练习: A）把下列句子译成汉语。1. 一米是一英尺的三倍多。_2. 现在我们家乡学校的数量比解放前增加了四倍。_3. 北京有我家乡城市的十个那么大。_

13、4. 这个房子是那个房子的两倍大。_5. 早稻产量比去年提高百分之二十五。_B）根据第一句, 完成第二、三句, 每空填一词, 使句意不变。1. This river is three _ times as wide as that one. This river is _ times the _ of that one. This river is _ _ than that one. 2. The meeting room is three times bigger than our office. The meeting room is _ times as _ as our office

14、. The meeting room is _ times the _ of our office. 3. The new building is five tim es the height of the old one. The new building is _ times as _ as the old one. The new building is _ times _ than the old one. 答案: A）1. A metre is 3 times more than（. is 3 times the length of）a foot. 2. There are now

15、five times as many schools in my hometown as before liberation. 3. Beijing is ten times as big as（nine times larger than ten times the size of）my hometown. 4. This house is twice as large as that one. 5. The output of early rice is 25 the height of last years. B）1. three, width; twice wider 2. three

16、, big; three, size 3. five, high; four, higher 有这样一道高考题：（ 2003 上海） The house rent is expensive. Ive got 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 该题的正确答案为 D .显然本题是在考查倍数的表达法。倍数表达法是高中英语教学的重点，也是历年

17、的高考热点之一。掌握倍数的表达法对于同学们学好英语具有重要意义。下面对倍数的几种表达法作一归纳：一、用 times 表示倍数（一般限于包括基数在内三倍或三倍以上的数。表示两倍的数，一般用 twice ）。其句式有： 1. “ times 形容词 / 副词的比较级 than ”例如： Line AB is three times longer than line CD. 线段 AB 是（线段） CD 的三倍长。 This hall is five times bigger than our classroom. 这个大厅比我们的教室大 5 倍。 2. “ times +as + 形容词 / 副词

18、的原级 as ”例如： This table is three times as long as that one. 这张桌子是那张桌子的三倍长。 This dictionary is five times as thick as the one you borrowed from the library. 这本词典的厚度是你从图书馆借的那本（厚度）的 5 倍。 3. “ times + the + 名词（如： size， height， weight， length， width 等） of ”例如： The earth is 49 times the size of the moon. 地

19、球的体积是月球的 49 倍。 This river is three times the depth of that one. 这条河是那条河的三倍深。 4. “ times + more 名词 than ”例如： He earns five times more money than he did ten years ago. 他现在挣的钱比十年前挣的多 5 倍。 There are twice more students in our class than in theirs. 我们班的学生人数比他们班多两倍。 5. “ times +as many （或 much ）名词 as ”例如：

20、 Weve produced twice as much cotton this year as （ we did ） ten years ago. 今年我们生产的棉花比十年前多了一倍。（汉语中的多一倍实际上也指两倍一样多。） He has got three times as many books as his sister. 他拥有的书的数量是他妹妹的 3 倍。 6. “ times + what 从句”例如： The length of the road is four times what it was three years ago. 这条路的长度是三年前的 4 倍。 The pri

21、ce of the meat is twice what it was last year. 肉价是去年的两倍。 7.“ times + up on （或 over ）”例如： The size of the sun is a million times over that of the earth. 太阳的体积比地球的体积大一百万倍。 He is three times up on your age. 他的年龄是你的 4 倍（或：比你的年龄大 3 倍）。 8. “ +by + times ”例如： Compared with last year， our coal output has in

22、creased by three times. 与去年相比，我们的煤产量增长了 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 被比较对象”例如： The number of the students in our school has increased for times compared with 1980. 我们学校的学生人数比 1980 年增加了 3 倍。 10. “ times + that of + 被比较对象”例如： In this worksh

23、op the output of July was 3.5 times that of January. 这个车间七月份的产量是元月份的 3.5 倍。二、用分数、百分数表示倍数。例如： The box is one-third bigger than that one. 这个盒子比那个盒子大三分之一。 Last year the output value of industry was 59 percent higher than that of 1976. 去年工业产值比 1976 年增长了 59 。 My command of English is not half so good as

24、yours. 我英语掌握得还不及你的一半儿好。三、用 again （一倍）， double （两倍）， triple （三倍）， fourfold （四倍）等词表示倍数。例如： My Aunt is as old again as I am. 我姑姑的年龄比我大一倍。 The top-brand clothes are often sold as double the normal price here. 这里名牌衣服的售价经常比正常的售价高一倍。 The new work procedure tripled the output. 新工艺使产量增加两倍。 The output of grain increased fourfold. 粮食产量增加了三倍。巩固练习 1. （ 2002 上海春） Americans eat _ vegetables p