I don't know John, but taking responsibility is the key.
"Knowing John, he's probably got other agents looking for her."
He knew John as well as one could know another person; but it had never been any of his business.
I know John, when he sets his mind to something.
"You don't know how many of them there could be, John."
Isn't anyone ever came in before that knows John.
We feel honored to have known John and been given the opportunity to be involved in such a noble cause.
It was a bit unnerving; they didn't even know John.
The pair of them had known John for more than a decade, and it was a great reunion.
"You know, John, we ought not to get too excited about this information."