1)倍数＋形容词/副词比较级＋than

??The girl is ten times cleverer than her brother.

2)倍数＋as+形容词/副词/(名词)＋as

??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

??The sun is many times the size of the moon.

4)动词＋倍数

??The pants have shortened two times since they were bought.

5)动词+by+数词/百分比/倍数

??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.