He was doing a live commentary of the soccer game.

He was observing a three-dimensional image using a stereoscope.

I cross this overpass every day to go to school.

This wooden bridge has existed since ancient times.

I go hiking in the mountains every weekend.

Be careful, as there are venomous snakes lurking in the forest.

He beat the enemy in the game.

He always speaks in polite language.

The police are looking for an eyewitness to the incident.

He was an eyewitness to the incident.