倍数表达法

倍数表达法是历届高考的热点。当我们要表达甲是乙的几倍时，通常可使用以下句型：

1•倍数+as+形容词或副词的原级+as+其它。这种结构又常演变成下列两类：①倍数+as+ma ny+可数

名词复数+as;②倍数+as+much+不可数名词+as。如：

There are seve n times as many people as I expected 是我预料的人数的七倍。

There is five times as much coffee in this glass as in that one.这个杯子里的咖啡是那个杯子里的五倍。2•倍数+形容词（或副词）的比较级+ tha n+其它。如：

The hall is five times bigger than our classroom. 这个大厅的面积比我们教师大五倍。

3.倍数+the size/height/length/.+of+ 其它。如：

This road is six times the length of that one. 这条路是那条路的六倍长。

4.计量名词+of+名词+be+倍数+that+of+其它。如：

The size of the newly broadened square is four times that of the previous one. 新扩建的广场为以前的四倍大。

5.倍数+what 从句。如：

The production is now three times what it was ten years ago. 现在的产量是十年前的三倍。

6.倍数+more+名词+tha n+其它。如：

There are nine times more books in his bag than in yours.

他书包里的书比你书包里的书多九倍。

7.其它表达。如：

She's twice/double my age.她的年龄是我的两倍。

The average income of the staff has been increased by 50 percent compared with last year.

与去年相比，该单位职工的收入已增加了50% 。

He runs faster than me by three times. 他跑得比我快三倍。

{ 考查方向}

1）倍数在句中的位置一般放在第一个as 前面或比较级前面或名词前面。

2）用times 表示倍数时，一般只限于表示包括基数在内的三倍或三倍以上的数。表示两倍可以用twice 或double,一倍用once.

【重点归纳】除了我们初中所学的形容词的比较级的用法，本模块我们主要归纳几种句式结构：（一）含倍数的比较句型1.倍数+as+形容词原级+as…。如：

This bridge is three times as long as that one.

His room is twice as big as mine;in other words,mine is only half as big as his.

【特别提醒】

“ as…a中间加入名词的句式：

•咅数+as+形容词+a/an+可数名词单数+as…

•咅数+as+形容词+可数名词复数/不可数名词+as…。如：

Last year my brother twice as big a new house as mine.

He has collected more than three times as many stamps as I （have）.

I spent twice as much time on my studies as you did.

难点点拨】

该结构的省略：通常省略形容词后面的名词及比较的部分。如：

I have to transfer( 转乘) buses so I spend twice as much (money as others)for the bus every day.

2.倍数+形容词比较级+than…。如：

This street is four times shorter than that one.

Fear of danger is ten thousand times more terrifying than danger itself. 【特别提醒】

倍数+形容词比较级+名词+than -6•如:

He earns five times more money now than he did ten years ago.

There are three times more books in our library than in yours.

3.倍数+the+ 名词(如size,height,weight,length,width,depth 等)+of …飞如：This well is three times the depth of that one.

4.另外，请注意下面两种说法：

( 1)倍数+what 从句。如：

The length of the road is four times what it was three years ago.

(2)倍数+that of+ 被比较对象。如：

Airmail charges almost twice or three times that of a normal mail.

(二)其它句式

1."比较级+and+比较级"表示"越来越•••"女口：

Things are getting better and better every day.

Our country is becoming more and more beautiful.

2."the+比较级…，the+比较级…"表示越…，就越…"。女口:

The more you have, the more you want.

The more a man knows, the less he knows he knows.

【知识扩展】