it is known to all that 和as is known to all that 区别

Question

如题所述

Answer 1

都表示“众所周知”，但是用法不同
It is known to all that the earth is round. it是形式主语；that引导主语从句，是真正都主语
As is known to all, the earth is round. 中间有逗号， as 引导从句，the earth is round是主句