At last she looked up again, almost frowning with concentration.

He frowned at me with a long look in which I read nothing.

She was frowning with seriousness in trying to understand, which brought a smile to his face.

The last few steps, she closed her eyes and frowned with concentration.

He frowns with perhaps the first frown she has seen.

He frowned at the man with the belly wound, then went over to the one shot in the head.

He frowned at her, with one hand resting on the phone.

She frowned with a smile at the corners of her mouth.

She frowned with the effort of speaking, as if English were becoming unfamiliar.

Ma put two fingers to her mouth and frowned with thought.