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.