He sang a song while playing the floor drum.

He is a very thrifty person.

He was able to spell the word correctly.

He was beating the drum.

The theory of harmonic oscillators is a fundamental concept in physics.

He is acting based on humanitarianism.

We believe that all people should be treated based on the spirit of egalitarianism.

Transitive verbs require an object that is directly moved by the subject.

He is a true humanitarian, always striving to alleviate the suffering of others.

He often thinks about problems from a humanitarian perspective.