表示两倍 可以用 twice 或double,一倍用 once. 【重点归纳】 除了我们初中所学的形容词的比较级的用法,本模块我们主要归纳几种句式结构: (一)含倍数的比较句型 1.倍数+as+形容词原级+as…。如: This bridge is three times as long as that one. His room is twice as big as mine;in other words,mine is only half as big as his. 【特别提醒】 “as…as”中间加入名词的句式: 倍数+as+形容词+a/an+可数名词单数+as… 倍数+as+形容词+可数名词复数/不可数名词+as…。如: Last year my brother twice as big a new house as mine. He has collected more than three times as many stamps as I (have). I spent twice as much time on my studies as you did. 【难点点拨】 该结构的省略:通常省略形容词后面的名词及比较的部分。如: I have to transfer(转乘)buses so I spend twice as much (money as others)for the bus every day. 2.倍数+形容词比较级+than…。如: This street is four times shorter than that one. Fear of danger is ten thousand times more terrifying than danger itself. 【特别提醒】 倍数+形容词比较级+名词+than…。如: He earns five times more money now than he did ten years ago. There are three times more books in our library than in yours. 3.倍数+the+名词(如size,height,weight,length,width,depth 等)+of…。如: This well is three