He is troubled with his work.

His body was covered in muscles.

This sculpture is made of pure copper.

A verb plays the role of expressing actions or states in a sentence.

He always acts based on humanity.

Bottlenose dolphins are considered to be particularly intelligent among marine animals.

He is planning a transfer from Tokyo to Osaka.

He is my schoolmate from elementary school.

He is learning how to use gerunds.

When she said thank you, I replied with 'you're welcome'.