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.