As you already know.
As you know.
You already know that.
I think you already know that.
As you already know
As you know.
I probably already know that.
You should already know that.
You have information about that.
You know that.
You probably already know that.
You may already know that.
You should know.
It is you who should know.
I guess you know that already.
You should know that.
You may already know that.
I understand what you mean.