从一道高考题谈倍数的表达法2011-10-26.doc

从一道高考题谈倍数的表达法陕西省岐山县益店高级中学 崔娟 722403倍数表达法是高中英语教学的重点，也是历届高考的热点下面是2011年陕西省高考试题单项选择的第十七题：The new studium being built for the next Asian Games will be ____ the present one.A. as three times big as B. three times as big asC. as big as three times D. as big three times as根据倍数的表达法，答案为B然而由于很多同学对倍数的表达掌握的不是很好，所以此题做得并不是很理想下面我就针对倍数的表达做一下小结当我们要表达A是B的几倍时，通常用下面五个句型来表示：一. 由“倍数+ as +形容词（副词）的原形+ as ”结构组成，表示“A是B的……倍”例如：1. Asia is four times as large as Europe．亚洲的面积是欧洲的四倍. (亚洲的面积比欧洲的大三倍)2. The plane flew ten times as high as the kite．那架飞机的飞行高度是那个风筝的十倍。

那架飞机的飞行高度比那个风筝的高出九倍3. This tree is three times as tall as that one. 这棵树是那棵树的三倍高这棵树比那棵树高两倍高考示例：1.Ten years ago the population of our village was ____ that of theirs.A. as twice large as B. twice as large asC. twice as much as D. as twice much as (NMET 2008陕西-16)2. This big stone is ____ that one.A. three time as heavy as B. three times as heavy asC. three time as heavier as D. heavy as three times as 3. His father is ____ as he.A. two times as old B. two time as old C. twice as old D. as twice old 答案：1.B 2.B 3.C二. 由“倍数+as+形容词+名词复数（不可数名词）+as”结构组成，表示“A是B的……倍”。

此结构最常考的是“倍数+as+much+不可数名词+as”和“倍数+as+many+复数名词+as”这两种用法例如：1. The workers have produced twice as much cotton this year as they did two years ago. 工人们今年生产的棉花是两年前的两倍工人们今年生产的棉花比两年前多一倍.）2. The library of our school has six times as many books as theirs. 我们学校图书馆的书是他们学校的六倍我们学校图书馆的书比他们学校的多五倍)高考示例：1. It is reported that the USA uses ______energy as the whole of Europe. A. as twice B. twice much C. twice much as D .twice as much. （2004广西卷33）2. Americans eat ____ as they actually need every day.A. twice as much protein B. twice protein as much twiceC. twice protein as much D. protein as twice much 3. Americans eat _____vegetables per person today as they did in 1910. A. more than twice B. as twice as many C. twice as many as D. more than twice as many（2002上海春季卷39）4.After the new technique was introduced, the factory produced ____ cars in 2002 as the year before. A. as many twice B. as twice many C. twice many as D. twice as many 答案：1.D 2.A 3.D 4.D三. 由“倍数+as +形容词+a(an)+名词单数+as” 结构组成，表示“A是B的……倍”。

例如：1. The boss provided Jim with four times as big an apartment as yours. 老板给Jim提供的公寓的大小是你们的四倍老板给Jim提供的公寓比你们的大三倍2. This is two hundred times as expensive a car as a bike. 这辆车的价格是自行车的二百倍这辆车比自行车贵一百九十九倍高考示例： 1. All the second-hand goods are sold at ___ before.A. twice as lower price as B. as twice low price thanC. twice as low a price as D. twice lower price than 2. As we have known from the map of the world, this is ____. A. twice as large an island as that B. twice as larger as that islandC. as twice large as that one D. twice as a large island as that 答案：1.C 2.A 四. 由“倍数+形容词（副词）比较级+than”结构组成，表示“A比B大或重等几倍”。

例如：1. The Yangtze River is almost twice longer than the Pearl River. 长江差不多比珠江长两倍长江的长度是珠江的三倍2. This hall is five times bigger than our classroom．这个大厅比我们的教室大五倍这个大厅是我们教室的六倍3. The car runs twice faster than that truck．这辆小车的速度比那辆卡车快两倍这辆小车的速度是那辆卡车的三倍高考示例：1. This hall is three times ____ than that one.A. big B bigger C. biggest D. the bigger 2. My room is ____ yours. A. larger three times B. three times larger thanC. larger the three times D. three time larger than 答案：1.B 2.B 五. 由“倍数+ the size（length,width,height,weight,age,amount，……）of”结构组成，表示“A是B的几倍大小（长短；数量等）”。

此类结构中一定要注意不要漏掉名词前的the例如：1. The earth is forth-nine times the size of the moon. 地球是月亮的49倍大地球比月亮大48倍.）2. This hill is four times the height of that small one．这座山的高度是那座小山的四倍这座山比那座小山高三倍.）3. This street is six times the length of that street．这条街是那条街的六倍长这条街比那条街长五倍)高考示例：1. .At a rough estimate, Nigeria is ____Great Britain. A. three times the size as B. the size three times of C. three times as the size of D. three times the size of (2005上海28题）2. Paper produced every year is ___ the word’s production of vehicles. A. the three times weight of B. three times the weight ofC. as three times heavy as D. three times as heavier as （1998上海7） 答案：1.D 2.B 我们在学习中，要灵活运用以上表达，有时候，由于上下文的需要，出题者会从省略等方面考查倍数的表达，如下（高考示例2）。

此外，我们也要会举一反三，倍数的以上结构也可以用来表达A是B的一半（例1及高考示例1）或A是B的几分之几或百分之几（例2及高考示例3）例如：1. I want to know why Jake always gets good marks when he does only half as much as the others. 我想知道杰克为什么只下了别人一半的功夫，成绩却总是很好呢2. The grain output is 8 percent higher this year than that of last year. 今年比去年的粮食产量增加了8%高考示例：1. What a table! I’ve never seen such a thing before.It is ____ it is long!A. half not as wide as B.wide not as half asC. as wide as not half D. not half as wide as (2005湖北卷28）2.The house rent is expensive. I’ve got about half the space at home and I’m paying __。