Asia is four times as large as Europe．亚洲的面积是欧洲的四倍. 

This hall is five times bigger than our classroom．这个大厅是我们教室的五倍.

（纠正原翻译）

This hall is five times bigger than our classroom．=

This hall is five times as big as our classroom．

以上表达，仍然是比较从句，这是省略了is。

This hall is five times bigger than our classroom is．=

This hall is five times as big as our classroom is．