全面整理英语中倍数表达的十种方法小结

 　　用英语表达A 是 B 的 N 倍长（宽，高，大，重等），A 比 B 长（宽，高，大，重等）N 倍 或A ；的长度（宽度，高度，大小，重量等）是 B 的 N 倍，可用下列几种方法

一：主语+谓语+数字+ times + as + 原级+ as +比较对象

It cost three times as much as I had expected. 它花的钱比我预期的多两倍。

Cats sleep twice as much as people. 猫睡觉的时间比人长一倍。

Unemployment among blacks was twice as high as that for white. 黑人的失业人数是白人的两倍。

New drivers have twice as many accidents as experienced drivers. 新驾驶人所出的事故是老驾驶人的两倍。

There is an entrance hall of perfect proportions, twice as long as it is wide. 有一处比例堪称完美的门廊，长是宽的两倍。

二：主语+谓语+数字+ times + the size / length / depth / height / width / quantity / amount / etc+ of +比较对象

Their house is twice the size of ours. 他们的房子是我们的两倍大。

The queen bee is twice the length of a worker bee. 蜂王的体长为工蜂的两倍。

This room is twice the length of the other, but much narrower. 这个房间的长度是那个房间的两倍，但窄得多。

Concorde crosses the Atlantic at twice the speed of sound. 协和飞机以两倍于声速的速度飞越大西洋。

比较同义句：

He eats twice the amount that you eat.= He eats twice what you eat. 他比你多吃一倍。/

This box is twice the size of that one.= This box is twice as large as that one. 这个盒子是那个盒子的两倍。

三：主语+谓语+数字+ times + 形容词（副词）的比较级+ than + 比较对象

Your bag is twice bigger than mine. 你的包比我的大两倍。

She’s a zillion times brainier than I am. 她比我聪明亿万倍。

She can walk three times further than you. 他能比你多走三倍的路。

It was ten times more difficult than I expected. 这事比我预想的要困难十倍。

It took three times longer I had expected. 这件事比我预料的多花了两倍的时间。

注意：

1. 在表示两倍时，我们常用twice或double。例如：

This year we have produced twice as much corn as we did last year. 我们今年生产的玉米是去年的两倍。

She is double my age. 她的年龄是我的两倍。

2. 在表示三倍或三倍以上的倍数时，我们常用times表示，可以译为"是......的几倍"；"比......大/高/长......几倍"等等。

四：将数字与-fold连用构成形容词或副词

This is a ten-fold increase in five years. 在5年中翻了10倍。

The population in this area has increased fourfold. 该地区的人口已增加到原来的4倍。

The reasons for the delay are three fold. 延误的原因有三。

要注意正确理解threefold, fourfold, fivefold等的意思，如fourfold的意思是four times as much or as many，译成汉语是“4倍(的)”：

The value of the house has increased fourfold since 1939. 房价自1939年以来增加到原来的4倍(或：房价自1939年以来增加了3倍)。

五：记住以下句型

His income is double hers. 他的收入是她的两倍。

Capital expenditure was treble the 2002 level. 资本支出是2002 年的三倍。

The volume of traffic has grown by a factor of four. 车流量已是原来的4倍。

The amount of alcohol in his blood was triple the legal maximum. 他血液中的酒精含量为法定最高限量的三倍。

Sales have quadrupled in the last five years. 过去五年中，销售额已增长四倍。

This year we produced quadruple the amount produced in 2002. 我们今年的产量是2002 年的四倍。

We need double the amount we already have. 我们需要现有数量的两倍。

The money they were asking for was triple the amount we expected. 他们要的钱数是我们预期的3倍。

The amount of reclaimed glass used in industry has doubled in the last five years. 用在工业上的再生玻璃的数量在过去5年内增加了1倍。

六、 用"主语+谓语+...times + what引导的从句"表示。例如:

Cotton output is now ten times what it was ten years ago. 目前棉花的产量是十年前的十倍。  

七、 用"主语+谓语+...times + upon(或over)..."表示。例如：  

The size of the sun is a million times over that of the earth. 太阳的体积比地球的体积大一百万倍。

八、可用"主语+谓语+...+ as + 形容词（副词） + again + as"表示。 例如：  

Nine is as much again as three. 九是三的倍数。 

九、 可用"主语+谓语+ 倍数（百分比）"表示。例如：  

This year we'll learn 20% more words from our texts than we did last year. 今年我们学习的单词比去年多20%。

十、用"主语+谓语+ to + 数词"表示"增加到......数"。例如：  

The number of students in our school has increased to 2001. 我们学校的学生数已增加到两千零一人。