英语常考五种倍数常见表示方法
1）、倍数＋形容词/副词比较级＋than
「例如」The girl is ten times cleverer than her brother.
2）、倍数＋as+形容词/副词/（名词）＋as
「例如」
His apartment is three times as large as that of mine. Americans eat（ ）as they actually need every day. （CET-4 1998，6）
A） twice as much protein
B） twice protein as much twice
C） twice protein as much
D） protein as twice much
本题考查倍数的表达方法，正确形式应为：倍数＋as+形容词/副词/（名词）＋as，故答案为A.
3）、倍数＋名词
「例如」The sun is many times the size of the moon.
4）、动词＋倍数
「例如」The pants have shortened two times since they were bought.
5）、动词+by+数词/百分比/倍数
「例如」 The landlord wanted to raise the rent by a third. Between 1974 and 1997， the number of overseas visitors expanded （ ）27%. （CET-4 2000，1）
A） by B） for C） to D） in
本题考查动词+百分比的表达方法，正确的连接词为by，故答案为A.
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