1.用…times表示。如：

My room is three times as large as yours.

我的房间是你的三倍大小。

　　2.如果表示“是……两倍数”，一般用twice。如：

My room is twice as large as yours.

我的房间是你的两倍大小。

用-fold表示。如：

The value of the stock has increased two-fold since we bought it .

股票的价值已涨至我们购买时候的两倍。

　　3.用%表示。如：

The collection of our school library is 200% up compared with 1998.

我们学校图书馆藏书量与1998年相比增长了一倍.

4.用double(翻一番)，triple(三倍于)，again等词表示倍数。如：

This coat cost me as much again as the coat I have just bought.

这件外套花了我刚刚买的这件大衣价格的一倍

倍数表达法

1)倍数+形容词/副词比较级+than

例如 The girl is ten times cleverer than her brother.

2)倍数+as+形容词/副词/(名词)+as

例如 His apartment is three times as large as that of mine. Americans eat( )as they actually need every day. (CET-4 1998,6) A) twice as much protein B) twice protein as much twice C) twice protein as much D) protein as twice much本题考查倍数的表达方法，正确形式应为：倍数+as+形容词/副词/(名词)+as，故答案为A.

3)倍数+名词

[例如 The sun is many times the size of the moon.

4)动词+倍数

例如 The pants have shortened two times since they were bought.

5)动词+by+数词/百分比/倍数

例如 The landlord wanted to raise the rent by a third. Between 1974 and 1997, the number of overseas visitors expanded ( )27%. (CET-4 2000,1) A) by B) for C) to D) in (A)

倍数经典考题

It’s reported that the United States uses______ energy as the whole of Europe.

A.as twice

B.twice much

C.twice much as

D.twice as much

答案 :

D

Having introduced the new equipment, our factory turned out ________ in 2004 as the year before．

A.as three times many cars

B.three times as many cars

C.as many cars as three times

D.three times more cars than

答案 :

B