As is know to all的句型为什么不能是As it is know to all

as is know to all和it is know to everyone的意思一样吗? Help My Parents As we all know,it is important to help paren As we all know ,it is not polite to keep others （）for a long 3.As we all know,it is easier to get into a bad habit than t As we all know,it is ( 5 )for animals to be good at getting 是 as is know to sb.还是as it know to sb. 翻译 As is know to all,lung cancer is at least in part caused as we all know it AS IS KNOWN TO ALL as it is known to all与as is known to all与it is known to all 有关as is known to us all,it is known to us all 的辨析 as is known to all的意思