英语倍数的表达方法ppt课件.ppt

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1、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。表示两倍的数用twice） 1.“1.“A A + be + + be + 倍数倍数 + as + + as + 形容词或副词原级形容词或副词原级 + as + + as + B B This treeThis tree is three times as is three times as talltall as as that onethat one. . 这棵树是那棵树的三倍这棵树是那棵树的三倍高高。His fatherHis father is twice as is twice as oldold as as heh

2、e. . 他父亲的年纪有他两倍他父亲的年纪有他两倍大大。1.1.亚洲的亚洲的面积面积是欧洲的四倍。是欧洲的四倍。 nAsia is four times as large as Europe.2.2.这块大石头的这块大石头的重量重量是那块的三倍。是那块的三倍。 This big stone is three times as heavy as that one. 3.3.那架飞机的飞行那架飞机的飞行高度高度是那只风筝的十倍。是那只风筝的十倍。 nThe plane flew ten times as high as the kite. n2.“A + be + 倍数倍数 + 形容词或副词的比较

3、级形容词或副词的比较级 + than + B ”nThe Yangtze River is almost twice longer than the Pearl River.长江差不多比珠江长两倍。nThe dictionary is exactly five times more expensive than that one.这本字典比那本恰好贵5倍。n这根绳的长度是那根绳的三倍。n这个大厅比我们的教室大五倍。n这辆小车的速度比那辆卡车快两倍。This rope is twice longer than that one This rope is three times as long a

4、s that one.This hall is five times bigger than our classroomThis hall is six times as big as our classroomThe car runs twice faster than that truckThe car runs three times as fast as that truck（比那根绳长二倍）（比那根绳长二倍）（是那辆卡车的三倍）（是那辆卡车的三倍）（是我们教室的六倍）（是我们教室的六倍）n3.“A + be + 倍数 + the + 计量名词 + of + B ”nThe newly

5、 broadened square is four times the size of the previous one.新扩建的广场是未扩建时的四倍大。n计量名词 ：size大, length长, width宽, height高, depth深，weight重n倍数+the size of n倍数+the length of n倍数+the height of n倍数+the weight of n倍数+the width of n倍数+the depth of 1.这条街是那条街的四倍这条街是那条街的四倍长长。 nThis street is four times the length o

6、f that one. 2.2.这座山的这座山的高度高度是那座小山的四倍。是那座小山的四倍。 nThis hill is four times the height of that small one. n4. “The + 计量名词 + of + A + be + 倍数 + that + of + B”nThe size of the newly broadened square is four times that of the previous one.新扩建的广场为以前的四倍大。nHe earns five times more money than he did ten years

7、ago.n他现在挣的钱比他十年前挣的多五倍。nThere are twice more students in our class than in theirs.n我们班的学生人数比他们班多两倍。5. “ times + more + 名词+ than ”nThere are four times more books in our library than in yoursn我们图书馆藏书（数量）我们图书馆藏书（数量）比你们比你们图书馆藏书图书馆藏书多多四倍。四倍。 （我们图书馆的藏书是你们的五倍）（我们图书馆的藏书是你们的五倍）nWe have produced twice more gr

8、ain this year than we did last yearn我们今年生产的粮食比去年增长了两倍。我们今年生产的粮食比去年增长了两倍。（是去年的三倍）（是去年的三倍）6.6. “ A A + be + + be +倍数倍数+as many+as many（或（或muchmuch）+ +名词名词+ +其他其他+as+as ”lAfter the technique was introduced，the factory produced twice as many tractors in 1988 as the year before采用新的技术以后，那个工厂采用新的技术以后，那个工厂1

9、9881988年生产的拖拉机是前年生产的拖拉机是前一年（一年（19871987年）的两倍。年）的两倍。（比前一年增长一倍）（比前一年增长一倍）lThere 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。这个壶里的水（量）是那个壶里的三倍。nWeve produced twice as much cotton this year as （ we did ） ten years ago.n今年我们生产的棉花比十年前多了一倍。今年我们生产的棉花比十年前多了一倍。nHe has got three ti

10、mes as many books as his sister.n他拥有的书的数量是他妹妹的他拥有的书的数量是他妹妹的 3 3 倍。倍。7. “ times + what 7. “ times + what 从句从句” ”nThe 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。nThe price of the meat is twice what it was last year.n肉价是去年的两倍。8. “ + by times 8. “ + by times ”nCompared

11、 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。nHis speed is faster than mine by four times. 他的速度比我的快 4 倍。9.“ times + compared with+ 9.“ times + compared with+ 被比较对被比较对象象” ”nThe number of the students in our class has increased four times compared with 1980.n我们学校的

12、人数比1980年增加了4倍。10.“ times + up on 10.“ times + up on （或（或 over over ） ” ”nThe size of the sun is a million times over that of the earth.n太阳的体积比地球的体积大一百万倍。nHe is three times up on your age.n他的年龄是你的 4 倍（或：比你的年龄大 3 倍）。11.“ times + that of+11.“ times + that of+被比较对象被比较对象” ”nIn this workshop the output of

13、 July was three times that of January.n这个车间7月份的产量是元月份的三倍。二、用分数、百分数表示倍数nThe box is one-third bigger than that one.n这个盒子比那个盒子大三分之一。nLast year the output value of industry was 59 percent higher than that of 1976.n去年工业产值比 1976 年增长了 59 。nThe average income of the staff has been increased by 50 percent co

14、mpared with last year. 与去年相比，该单位职工的收入增加了50%.My command of English is not half so good as 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。nMy Aunt is as old again as I am.n我姑姑的年龄比我大一倍。nThe top-brand clothes are often sold as double the normal price here. 这里名牌衣服的售价经

15、常比正常的售价高一倍。nIm twice/ double his age. 我的年龄是他的两倍。nThe new work procedure tripled the output. 新工艺使产量增加两倍。nThe output of grain increased fourfold.n 粮食产量增加了三倍。nIve paid five times the usual price for the stamp. 我出了5倍于往常的价格买这枚邮票。nThe price of TVs are twofold( adj. 两部分的, 双重的) down over these years. 近几年来，电视机的价格下降了两倍。