倍数表达法

… 倍数+ 比较级 + than … 

… 倍数 + as 原级 as … 

… 倍数 + the + 量词 + of … 

Our classroom is three times larger than theirs.

Our classroom is three times as larger as theirs.

Our classroom is three times the size of theirs.  length, height, width, weight, size

The earth is 49 times the size of the moon. 地球的体积是月球的 49 倍。

This river is three times the depth of that one. 这条河是那条河的三倍深。

Line AB is three times longer than line CD. 线段 AB 是（线段） CD 的三倍长。

This hall is five times bigger than our classroom. 这个大厅比我们的教室大 5 倍。

China is almost twice / double the size of Mexico in area.

  This river is three times the depth of that one.  

The newly broadened square is four times the size of the previous one.

I have paid five times the usual price for the stamp.

 … times + more ＋名词＋ than …

 … times + as many/much + 名词+ as …

  This year we have produced 30% more bikes than last year. 比去年增加了30%

  This year we have produced 30% as many bikes as last years.

  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。

  We've produced twice as much cotton this year as (we did) ten years ago.

今年我们生产的棉花比十年前多了一倍。（汉语中的多一倍实际上也指两倍一样多。）

He has got three times as many books as his sister. 他拥有的书的数量是他妹妹的 3 倍。

  We have produced three times as many computers as we did last year.

  He has read three times more books than I have. 他读过的书是我读过的四倍多。

He earns five times more money than he did ten years ago.

There are twice more students in our class than in theirs.

… times + what 从句 

The length of the road is four times what it was three years ago. 这条路的长度是三年前的 4 倍。

The price of the meat is twice what it was last year. 肉价是去年的两倍。

The length of the road is twice / double what it was three years ago.

The price of the meat is twice what it was last year.

… 比较级 + than … by + 倍数

The line is longer than that one by twice. 这根线是那根线的三倍长。

  The average income of the staff has been increased by 50 percent compared with (that of )last year.

其他倍数句型

The size of the newly broadened square is four times that of the previous one.

The price of this kind of TV sets is twofold down over these years. two adj. 两倍的   下降两倍

I’m twice / double his age. / I’m twice/ double as old as he is.