You stay away from him and I keep my mouth shut.

I know why he kept his mouth shut, of course.

You keep your mouth shut and do what you're told!

I kept my big mouth shut and let her help me.

Why couldn't you have kept your big mouth shut for a while longer?

All you had to do was keep your mouth shut.

All you have to do is keep your mouth shut.

He looked at the girl, and kept his mouth shut.

The thing for him to do was keep his mouth shut.

Keep your mouth shut and we'll both live to fight another day.