请问It's said that by us从句是被动语态,怎么It's known to us that从句却不是?

It's said that从句是被动语态,怎么It's known to us that从句却不是? 请问句型It's known to us that从句是被动语态吗? 你好!It's known to us that从句,也是被动语态吗?如是,怎么这里用TO US,不用BY US? It's said+that从句,“据说……”,为什么不是It says+that从句 ---It’s said that Williams will come to help us. 英语的宾语从句16.We think that it’s important for us to learn Engli It's known to us that practice makes perfect.与As is known to It's known to us all that some of the signs are represent cr It's known to us all that some of the signs are represented- it's a pity that you can't join us 这句that引导的是什么从句? It's well-known to all that... it is well known to us that是什么意思