英语倍数
1. This room is three times as big as that one. 三倍大；大两倍
He earns twice as much as he used to. 他比往常多赚二倍的钱。
We've produced twice as much cotton this year as ten years ago. 今年的棉花比十年前多了一倍。
2. This room is three times the size of that room. 三倍大；大两倍
This river is three times the depth of that one. 这条河深度是那条河的三倍。
The price of the meat is twice what it was last year. 肉价是去年的两倍。
In this workshop the output of July was 3.5 times that of January. 七月份的产量是元月份的
3.5 倍
I have five times the number of Tom’s books. 我有五倍于汤姆的书。
I’ve paid five times the usual price for the stamp.
我出了5倍于往常的价格买这枚邮票。
3.This room is twice bigger than that room. 大两倍；三倍大
This street is three times wider than that one. 这条街比那条街宽三倍。
I am twice older than he. 我的年纪比他大两倍。
还可以用over，more than 等表示“比……倍还要多”。例如：
He is more than three times as rich as I. 他的财富是我的三倍还不止。
I am more than twice as old as he. 我的年龄是他的两倍还不止。
He studies more than three times as hard as I. 他用功的程度是我的三倍还不止。
He has collected more than three times as many stamps as I .他搜集的邮票是我的三倍还不止。
使用more...than 比较级的例句：
He earns five times more money than he did ten years ago. 他现在挣的钱比十年前挣的多5 倍。
There are twice more students in our class than in theirs. 我们班的学生人数比他们班多两倍。
比较级也可使用分数、小数等数字。例如：
The box is one-third bigger than that one. 这个盒子比那个盒子大三分之一。
Last year the output value of industry was 59 percent higher than that of 1976. 去年工业产值比1976 年增长了59 ％。
My command of English is not half so good as yours. 我英语掌握得还不及你的一半儿好。
英语中有些词表示特定的倍数，例如：again (一倍), twice, double (两倍), triple (三倍), fourfold (四倍) 等数。
My Aunt is as old again as I am. 我姑姑的年龄比我大一倍。
The top-brand clothes are often sold as double the normal price here. 售价经常比正常的售价高一倍。
The new work procedure tripled the output. 新工艺使产量增加两倍。
The output of grain increased fourfold. 粮食产量增加了三倍。
使用by, compared with 等
Compared with last year, our coal output has increased by three times.
与去年相比，我们的煤产量增长了 3 倍。
The number of the students in our school has increased four times compared with 1980.
我们学校的学生人数比1980 年增加了3 倍。
The price of TVs are twofold down over these years.
近几年来，电视机的价格下降了两倍。
Practice.
1. 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
2. Paper produced every year is _______ the world's production of vehicles.
A. the three weight of
B. three times the weight of
C. as three times heavy as
D. three times as heavier as
3. With the help of the German experts，the factory produced ______ cars in 1993 as the year before.
A. as twice many
B. as many twice
C. twice as many
D. twice many as
4. This ship measures ________ that one.
A. as twice as long
B. as twice long as
C. twice long as
D. twice as long as
5. After the new technique was introduced, the factory produced _______ tractors in 1988 as the year before.
A. as twice many
B. as many as
C. as twice as many
D. twice as many
D B C D D
A）根据第一句, 完成第二、三句, 每空填一词, 使句意不变。
1. This river is three times as wide as that one.
This river is ______ times the _______ of that one.