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　　倍数表达方式

　　1. 表达方式：twice,three times, double, triple

　　2. 形式

　　(1)倍数+as+adj/adv原级+as

　　举例：This apple is twice as big as that pear. My grandpa is three times as old as me. The foreigner run four times fast as i do. This bag is twice as big as that one. Our house is three times as big as my friend’s house.

　　(2) 倍数+adj/adv比较级+than

　　举例：This apple is twice bigger than that pear. My grandpa is three times older than me. The foreigner run four times faster than i do. This bag is twice bigger than that one. Our house is three times bigger than my friend’s house.

　　(3) 倍数+the+Length/width,height/size(长宽高)+of

　　举例：This wall is twice the width of that wall. This ruler is three times the length of that eraser Our house is three times the size of my friend’s house.

　　以“地球比月球大六倍”这个句子为例，下面简单讲一下表示倍数的句型结构。

　　[1] 倍数的表示一般情况下为：数字+times，如六倍即为：6 times。比较特殊的是两倍，为twice

　　[2] 要表示地球比月球大六倍，我们一般可以有下面三种最基本的表示方法：

　　a) 主谓+倍数+as 形容词原形 as+宾语：The earth is six times as large as the moon.

　　b) 主谓+倍数+形容词比较级 than+宾语：The earth is 6 times larger than the moon.

　　c) 主谓+倍数+形容词对应的表示量的名词 of+宾语：The earth is 6 times the size of the moon.

　　其中，形容词与其对应的表示量的名词，包括large/big – size, long – length, wide – width等等.

　　[3] 与上面三种写法相对应，如果我们要表示，地球的大小比月球的六倍还大，只要在句子中加入more than即可，则可以写为：

　　a) The earth is more than 6 times as large as the moon.

　　b) The earth is more than 6 times larger than the moon.

　　c) The earth is more than 6 times the size of the moon.

　　[4] 另外有一系列表示倍数的词：double, triple, quadruple等，这类词本身可以做形容词，表示倍数。

　　如：The city was enclosed by walls of double thickness. 有如本题：The earnings in this quarter are (more than) double the earnings in the previous quarter. 同时，这类词也可以作为动词。以double为例，常见的基本句型包括：

　　a) double in size/number/value etc

　　Within two years the company had doubled in size.

　　The church has doubled its membership in the last five years.

　　b) double the size/number/amount etc (of something)

　　A promise was given to double the number of police on duty.

　　[5] 第三类表示倍数的形容词为：twofold, threefold, fourfold, tenfold等。以twofold为例，其意思为 two times as much or as many of something。该类词为形容词，多用于构成形容词+名词的词组，

　　如：a threefold increase in revenue，少用于比较两个事物之间的倍数关系。

　　以上就是GMAT语法知识点倍数内容解析,同学们如果还有任何关于出国留学的问题，可以拨打一诺留学的免费热线400-003-6508或者010-62680991进行咨询，或者点击一诺留学官方网站http://www.yinuoedu.net/页面的“在线咨询”与一诺留学专家直接对话。微信订阅号：留学圈 (微信帐号：yinuoliuxue )