His breathing became faster.

He has a secret plan to solve the problem.

He was trying to avoid and hide away from the police.

I found a single fallen leaf in the park.

I got through the cold winter wearing a down jacket.

I thought his behavior was complete madness.

His painting is drawn with a unique stroke of a brush.

He studied classical literature and aimed to excel.

He looked at the painting and was fascinated.

This value must be non-negative.