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.