高中英语倍数表达法详解
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. 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。
4. 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。
5. 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。
6. 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（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. 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.