I used cyclononadecane in an organic chemistry experiment.

This compound has cyclohexadecane as its main component.

This compound contains cyclotetradecane.

This compound mainly consists of cyclotridecane.

He is working hard.

I like to hang out with friends who have the same hobbies.

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.