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.