從高考題看倍數(shù)表達(dá)法

1、從高考題看倍數(shù)表達(dá)法請(qǐng)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(jiàn)， 倍數(shù)表達(dá)法是高中英語(yǔ)教學(xué)的重點(diǎn)， 也是歷屆高考的熱點(diǎn)。 當(dāng)我們要 表達(dá)甲是

3、乙的幾倍時(shí)，通常用下面三個(gè)句型來(lái)表示：1. 倍數(shù)+形容詞（或副詞）的比較級(jí)+than+從句”表示“A比 B 大（長(zhǎng)、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(zhǎng)兩 倍）。The car runs twice faster than that truck.這輛小車(chē)的速度比那輛卡車(chē)快兩倍（是那輛卡車(chē)的三倍）。2. 倍數(shù)+as+形容詞或副詞的原級(jí)+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(jī)的飛行高度是那個(gè)風(fēng)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(zhǎng)。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(dá)的三個(gè)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(shū)館里的 書(shū)比你們圖書(shū)館里的書(shū)多五倍。We have produced twice more grain this year than we did last year.我們今年 生產(chǎn)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(duì)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(duì)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(duì)象The number of the students in our school has increased 4 times compared wit h 1980.我們學(xué)校的學(xué)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(chǎn)量是 10 年前 的兩倍。2. doubl