從高考題看倍數(shù)表達法

1、從高考題看倍數(shù)表達法請看下面高考題：1. The house rent is expensive. I vegot about half the space I had at home a nd I mpaying here.（ 2003 上海高考題）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 春季高考題）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由此可見， 倍數(shù)表達法是高中英語教學的重點， 也是歷屆高考的熱點。 當我們要 表達甲是

3、乙的幾倍時，通常用下面三個句型來表示：1. 倍數(shù)+形容詞（或副詞）的比較級+than+從句”表示“A比 B 大（長、高、寬 等）多少倍 ”This rope is twice Ion ger than that one 這根繩是那根繩的三倍（比那根繩長兩 倍）。The car runs twice faster than that truck.這輛小車的速度比那輛卡車快兩倍（是那輛卡車的三倍）。2. 倍數(shù)+as+形容詞或副詞的原級+as+從句”表示“A正好是 B 的多少倍”Asia is four times as large as Europe 亞洲的面積是歐洲的兩倍。The plane f

4、lew ten times as high as the kite.那架飛機的飛行高度是那個風箏 的十倍（高出九倍）3.倍數(shù) +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 這條街是那條街的四倍長。This hill is four times the height of that small one 這座山的高度是那座山的四 倍（比那座山高三倍）除掌握倍數(shù)表達的三個常規(guī)句型外， 我們更要注意的是其常規(guī)句型的變形及其特 殊規(guī)律。一

5、、 常規(guī)句型的變形1. times+more+名詞（可數(shù)，不可數(shù)） +thanThere are five times more books in our library than in yours.我們圖書館里的 書比你們圖書館里的書多五倍。We have produced twice more grain this year than we did last year.我們今年 生產的糧食是去年的兩倍。2. times as many/much+名詞 +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+被比對象，表示 增加.倍”The grain output in that village is twice over that of 2002.4. times+that of+被比對象，表示 是.倍”In this workshop， the output of July was 4.5 times that of January.5. times+compared with+ 被比對象The number of the students in our school has increased 4 times compared wit h 1980.我們學校的學生人數(shù)比 1980 年增加了三倍。6. times+what+從句The production is now three times what it was ten years ago.二、 用 double 表示倍數(shù)1. double 用作形容詞，表示 兩倍的”The production is now double what it was ten years ago.現(xiàn)在的產量是 10 年前 的兩倍。2. doubl