And he could keep his tongue to himself, thank you.

You're not expected to say anything here, and you can't keep too quiet a tongue in your head.

Jenny couldn't keep her tongue still if she wanted to.

Marion saw the thought, and could not keep her tongue still.

I'd advise you to keep a civil tongue in your head and answer our questions.

"You promise to keep a civil tongue in your head?"

You are far from home, and would do well to keep a civil tongue in your head.

That's why you keep a respectful tongue in your head!

I'll thank you to keep a civil tongue in your head.

So pay attention, people; keep a civil tongue in your head, if you want to be heard.