1.倍数+ as +形容词原级 + as …
2.倍数+形容词比较级 + than …
3.倍数+ the +名词 (size/length/width/height...)of...
4.倍数+ that + of …
5.倍数+形容词性物主代词+名词
6.倍数 + what + 从句
7.用double, triple, threefold, fourfold等表倍数
8.倍数 as many/much + 名词 + as + 被比较对象
9.倍数 + more + 名词（可数或不可数）+than+被比对象。如：
10.分数/百分数（one-third /30%）+形容词比较级 + than …
表达倍数时，两倍用twice/double, 三倍以上用基数词+times,常见的表达方式如下：
倍数+as…as型
例如：We have produced three times as many computers as we did last year.我们生产的计算机是去年的三倍多。
2. 倍数+the size of 型
例如：China is almost five times the size of Mexico in area.在面积上，中国几乎是墨西哥的五倍大。
3. 倍数+what从句
例如：The length of the road is twice what it was three years ago.这条路是三年前的两倍长。
4. 倍数+比较级+than
例如：I am twice older than you. 我的年龄是你年龄的两倍。
5. 比较级+ than…+ by+倍数
例如：The line is longer than that one by twice.这根绳子比那根长两倍。
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