She had a deep frown on her face as she listened to the bad news.
He furrowed his brows in a puzzled frown as he tried to figure out the riddle.
She wore a confused frown on her face as she tried to make sense of the complicated instructions.
As the conversation went on, her frown deepened, indicating her growing frustration.
The teacher shot him a disapproving frown when he started talking during the exam.