英语中如何表达“A的长度是B的三倍”?好像还有一种用long的名词形式的，如何表达？A is three times the length of B.

A is three length than B.
A is three times as long as B.
A is twice longer than B.

A is three times as long as B.
A is twice longer than B.
A is 3 times of B in length.

A is three times as long as B.
A is twice longer than B.

A is 3 times of B in length

A is three times the length of B.有这种说法英语表示倍数增减或倍数对比的句型多种多样,其中有 一些（如下文中的句型②、⑤、⑥、⑧ 等,见圈码）很容易译错——其主要原因在于：英汉两语在表述或对比倍数方面存在...