Very likely no one will venture to knock before noon, and by then I will be far away.

Someone knocked her up eleven years before the ceremony, too.

Something that will either knock me out or kill me before I talk.

And next time, knock before you barge into my office.

They halted, and the policeman knocked softly upon the door immediately before them.

"A while, and knock before you come back in."

He had to knock twice before anybody in there heard him.

He made a quick stab at my left side, but I just managed to knock his arm away before our collision.

He had to knock three times before Miguel answered.

"Down on your knees and knock your head three times against the floor before you address me."