He used to be a member of the Chinese gang.

He experienced the harsh reality of the underbelly of society.

He likes to take a walk in the park at dusk.

He is undergoing training for extravehicular activity.

He engaged in an extravehicular activity from the spaceship.

He was arrested for kidnapping.

I am very interested in sociolinguistics.

He is studying the history of National Socialism.

He deeply believed in the principles of state socialism.

He deeply believes in the principles of state socialism.