screw up one's face

Big Ted screwed up his face with the effort of thought.

He screwed up his face like a boy with a dark secret.

Screwing up her face, she stepped slowly from the car.

And she screwed up her face to understand some of them, too.

Celia screwed up her face in an effort to think back.

She screwed up her face, making out it didn't matter.

The baby screwed up his face as if to cry, then sighed instead.

The girl screwed up her beautiful face and began to cry.

The woman screwed up her face, said something into the phone, and threw the paper back.

The old man screwed up his face as he tried to remember.