非常简单.
House A is 120 years old .House B is 40 years old.(用三种方法把它们合并起来 120 / 40)
1 House A is three times as old as House B.---------倍数+as +形容词/副词原级+as - - - -
2 House A is three times the age of House B.---------倍数+the +名词+of - - - - -
3 House A is three times older than House B--------倍数+形容词/ 副词比较级+than - -- - -