从高考题看倍数表达法

1、从高考题看倍数表达法请看下面高考题：1. The house rent is expensive. I vegot about half the space I had at home a nd I mpaying here.（ 2003 上海高考题）A. as three times much B. as much three timesC. much as three times D. three times as much2. Americans eat vegetables per person today as they did in 1910.（2002 上海 春季高考题）A. m

2、ore than twice B. as twice as manyC. twice as many as D. more than twice as many3. After the new technique was introduced， the factory produced tractors in 1998 as the year before.（NMET1990 ）A. as twice many B. as many twiceC. twice as many D. twice many as由此可见， 倍数表达法是高中英语教学的重点， 也是历届高考的热点。 当我们要 表达甲是

3、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）的比较级+than+从句”表示“A比 B 大（长、高、宽 等）多少倍 ”This rope is twice Ion ger than that one 这根绳是那根绳的三倍（比那根绳长两 倍）。The car runs twice faster than that truck.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 Europe 亚洲的面积是欧洲的两倍。The plane f

4、lew ten times as high as the kite.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” Thisstreet is four times the length 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

5、、 常规句型的变形1. times+more+名词（可数，不可数） +thanThere are five times more books in our library than in yours.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 than we did last year.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

6、 are six times as many students 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 number of the students in our school has increased 4 times compared wit h 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 ago.二、 用 double 表示倍数1. double 用作形容词，表示 两倍的”The production is now double what it was ten years ago.现在的产量是 10 年前 的两倍。2. doubl