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。
(2) 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。(使用by...)
His speed is faster than mine by four times.
他的速度比我的快 4 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。(使用 compared with)
The production of integrated circuits has been increased to three times as compared with last year. 集成电路的产量比去年增加了两倍。
The principal advantage of the products is a two-fold reduction in weight.
这些产品的主要优点是重量减轻了1／2。
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。
The average income of the staff has been increased by 50 percent compared with last year.
职工的收入增加了50%.
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。
She spent half as much money as you.
她花掉的钱只有你花掉的一半。作者: hung 时间: 2009-9-16 15:56
[练一练]
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作者: hung 时间: 2009-9-16 15:57
[Key：DBCDD]作者: king_lam 时间: 2009-9-16 18:19 标题: 回复 3# hung 的帖子 thank you for sharing.作者: fred.qiao 时间: 2009-9-17 22:12
THANKS A LOT!