但通常用于像as we allaknow, as it is know, as is know to all, as it is, as is said above, as always mentioned above, as is usual, as is often the case, as is reported in the newspaper等句式中。
As it known to the United States, Mark Twain is a great American writer.
He forgot to bring his pen with him, as was often the case.
He is absorbed in work, as he often was.
Boy as he was， he was chosen king.
as we all know, the earth is round.
The two brothers were satisfied with this decision，as was agreed beforehand.
Taiwan is，as you know，an inseparable part of China.