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高考复习:高中英语倍数表达法详解
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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+many+可数名词复数+as;
②倍数+as+much+不可数名词+as。如:
There are seven 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+ than+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/width.etc.+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+than+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…as”中间加入名词的句式:
●倍数+as+形容词+a/an+可数名词单数+as…
●倍数+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…。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…。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…"。如:
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…”。如:
The more you have, the more you want.
The more a man knows, the less he knows he knows.

【知识扩展】

在形容词比较级前可以加a little, a bit, a lot, no, any, much, far, even,still等副词(组表示程度的加深。如:
The result is much better than we expected.
Actually, health is far more important than wealth.


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