Drop the pieces into cold water to keep them from turning dark.

It was all I could do to keep from turning away.

"But how do you keep from turning into one of them?"

But what's to keep them from turning around and coming back?

I could not keep my thoughts from turning to him.

Anything to keep from turning into one of those people.

Is there anything I can do to keep the leaves from turning green?

There's only one way to keep the police and the newspaper people from turning you wrong side out.

But he couldn't keep his face from turning dark red.

It took all my will power now to keep from turning and looking back.