He was a witness to the incident.

Who is the contractor for this project?

He acts like a free person.

I am currently living in Tokyo.

In Catholicism, it is taught that if you commit the seven deadly sins, you will fall into hell.

His existence enriches my life.

He likes to travel, regardless of east or west.

He committed a serious crime.

I am learning how to use the present participle in English.

The present tense is used to express things that are happening now or general facts.