在英语中，表达倍数的常见结构有以下几种：

倍数 + 形容词/副词原级 + as...as

例如：The building is three times as tall as that one.

倍数 + 比较级 + than

例如：The new park is 10 times larger than the old one.

倍数 + the size/length/width, etc. of

例如：The Amazon rainforest is more than half the size of China.

倍数 + what从句

例如：He makes five times what he can earn back home.

倍数 + 倍数 + 形容词/副词原级 + as...as

例如：The hall is five times bigger than our classroom.

倍数 + 倍数 + 比较级 + than

例如：The girl is ten times cleverer than her brother.

倍数 + 倍数 + the名词 of

例如：Your playground is 900 metres wide, three times the size of ours.

倍数 + 倍数 + 形容词/副词比较级 + than

例如：This bridge is three times as wide as that one.

以上结构可以帮助你准确地表达倍数关系。请根据具体的上下文选择合适的表达方式