four times as much as/four times more than

【问】 This is a big house. I think the rent must be ____that of the smaller one.

A. four times more than B. four times as many as

C. four times as much as D. four times as

《英语结构难题解析》(复旦大学出版社，P.290)对上题的解答如下：

“比较

Your house is three times the size of mine.

Your house is three times as large as mine.

Your house is three times larger than mine.

第一句与第二句意思相同：你的房子是我房子的三倍大小。第三句与前两句意思不同：你的房子比我的房子大三倍，也就是我的房子的四倍大小。所以，在A项中four times后面用more than不对;B项的as many as错误，因为房租是不可数的，故C项正确。”

我对上面的解答有两点质疑：

1.第二句与第三句意思真的有区别吗?

2.该书说：“four times后面用more than不对”。真的不对吗?

【答】 第二句与第三句的意思完全相同。A is n times more than B是英语的常见句型，也是完全正确的。因此上面的试题既可选C，亦可选A。更详细的情形，请见more(n times morethan)和much(as much as)。