Bill knew that if he didn't act quickly his efforts would be in vain.

See, Bill, you just never know who lives in that apartment next door.

Bill apparently knew that, because he said there was no charge.

We had worked together for so long, and Bill knew he could trust me.

That way me and Bill know where each other stands.

But Bill, of course, knew no more than she did.

I suppose if there's anything wrong with them, Bill will know pretty soon.

Bill and Jen always know how to have a good time, whether it's at home, or away.

"Bill knows what he's doing, and you might trigger something important."

Bill would know how to get hold of the information I wanted.