倍数表达法(附易错高考题) (1)ppt课件

1、倍数表达法,本课件尽量收集更多的相关的倍数表达法，也罗列一些易错题。（张Arthur整理）,1,一、提分句型：表示“倍数的必备句型” 1Ais倍数times比较级thanB The train runs six times faster than the boat. 2Ais倍数timesas原级asB This garden is ten times as large as that one.,火车比轮船快六倍。,这个花园是那个花园的十倍大。,2,3Ais倍数timesthe size (height, length .)ofB Their newlybuilt school is almo

2、st five times the size of ours which was built ten years ago. Their newlybuilt school is almost ours which was built ten years ago. Their newlybuilt school is almost ours which was built ten years ago. 他们新修建的学校几乎是我们十年前修建的学校的两倍大。,five times as big as,four times bigger than,3,4. “ times + more 名词 than

3、 ” He earns he did ten years ago. 他现在挣的钱比十年前挣的多 5 倍,five times more money than,4,5. “ times +as many （或 much ）名词 as ”例如： Weve produced 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。）,twice as much cotton,5,6. “ times + what 从句”例如： 这条路的长度是三年前的 4 倍。 The length of the road

4、 is four times three years ago.,what it was,6,7. “ +by + times ”例如： Compared with last year，our coal output has increased . 与去年相比，我们的煤产量增长了 3 倍。,by three times,7,8. “比较级+than +by + times ” 例如： The time I spent is he spent by three times,more than that,我花费的时间是他花费时间的三倍,8,9. “ times + that of + 被比较对象”例

5、如： In this workshop the output of July was 3.5 times . 这个车间七月份的产量是元月份的 3.5 倍。,that of January,9,10. “multiply +. times ”和 “be multiplied by +. times ” 例如： 1、the sales of air -conditioners have been multiplied by four times since 2002。 2.The production has multiplied eight times,自2002年以来，空调的销售量增加了三倍.

6、（是之前的四倍）,产量提高了7倍。（是以前的8倍）,10,二、注意事项 1、两倍用twice/ double.三倍及以上用.times. 2、常见的倍数也可以用分数、百分数、或a quarter，a half 等修饰。 试翻译：这个盒子比那个大三分之一。,The box is one third times bigger than that one。,11,易错题集锦,1、（ 2002 上海春） Americans eat _ vegetables per person today as they did in 1910. A. more than twice B. as twice as m

7、any C. twice as many as D. more than twice as many,D。more than/ over/above+ 数字，是属于概数表达法的一种。此外，此题考查as.as 表达法，第二个as已经给出。,12,2、Ten years ago the population of our village was that of theirs。（2008.陕西） A.as twice large as B.twice as large as C.twice as much as D.as twice much as,答案B.本题的关键是population的修饰词用

8、的是large。 1、表示人口的多或少,不用much或little,而要用large或small。 例如: India has a large population. 印度人口众多。 Singapore has a small population. 新加坡人口少。 2、询问某国、某地有多少人口时,不用How much.?,而用How large.?;在问具体人口时用What.? 例如: -How large is the population of your hometown? 你们家乡有多少人口? - -What is the population of Canada? 加拿大的人口有多少

9、?,13,3、According to statistics，a man is to die of skin cancer as a woman。 A.more than twice as likely as B.twice more than as likely C.as likely more than twice D.twice more than likely as,答案 A. 同第一题。,14,4、(09四川19) My uncles house in the downtown area is much smaller than ours, but it is twice _ exp

10、ensive. A. asB. so C. too D. very,答案 A。考查as.as 结构的省略问题。,15,5. （上海市六校2010届高三联考） The lady was so keen on the fur coat that she would have bought it even if it cost _ A. as twice much B. much as twice C. as much twice D. twice as much,答案 D 同题4.,16,6、（甘肃省皋兰一中2010届高三上学期第三次月考） Even though you offered _ yo

11、u have just offered, 1 would not sell it to you. A. the money twice that B. twice the money that C. twice the money what D. the money that twice,答案 B。that引导的定语从句。若选择c，去掉选项中的money即可。,17,7、（湖南省湘潭市凤凰中学2009届高三第六次月考） I remember Alice, my little niece, often asked questions that children _ would ask. A. t

12、wice so old as she B. twice as old as her age C. older twice than her age D. twice of her age,答案 D。若选择B，要去掉age。,18,8（安徽省两地2010届高三第一次联考） Much to his surprise，he invited only twenty friends to the dinner，but came Atwice as many as Bas many as twice Ctwice as many Dtwice more than,答案 C 。as as结构的省略问题。第二

13、个as 为介词。,19,9、（山西省平遥中学2009年 9月高三高补摸底考试） -What does the model plane look like? -Well, the wings of the plane are _ of its body. A. more than the length twice B. twice more than the length C. more than twice the length D.more twice than the length,答案 C,20,10、（辽宁省本溪县2010届高三暑期补课阶段考试） - It is said that the number of Chinese characters you can type on your mobile phone is _the total number of Chinese characters. - I k