it known to all还是it is known to all

Question

如题所述

Answer 1

应该是it is known to all(that)
还有其他表达：
as everyone knows;
as is known to all;
Everybody knows ...;
it is common knowledge that ...;
as we （all）know；
as known to all。

Answer 2

it is known to all

Answer 3

it is known to all 众人皆知
被动语态被所有的人知道