He was carefully observing the surroundings.

I couldn't understand his actions.

He started to act immediately.

He always changes the topic to avoid the problem.

He always changes the topic to avoid the problem.

He was avoided by those around him because of his scoundrelly behavior.

He is known throughout the town as a scoundrel.

He acted scoundrelly and was criticized by those around him.

He is known throughout the town as a scoundrel.

He is my best friend.