倍数表达法的三个句型： 1..倍数+ as.+adj./adv.+as 2..倍数+ 形容词/副词的比较级 +than . 3..倍数+the +名词（size/ length/width/ height/ price / amount / ...+ of . 你的句子不规范,可以改写成： The books he got is 3 times more than his sister. The books he got is 3 times as many as his sister. The books he got is 3 times the amount of his sister . 再问： 主语是book 能than his sister吗？
