He was watching the float, waiting for a fish to bite.

He bought a new float before going fishing.

The children were playing hide and seek in the park.

Ayuko studies in the library every day.

The biting midge bit my skin.

Xunzi was an ancient Chinese philosopher and one of the important thinkers of Confucianism.

The crawling baby is playing in the living room.

A phonon is a physical concept that represents the vibration of a crystal lattice.

The piston of the engine is moving.

The boy is playing in the park.