The Intermediate Cozy English Grammar Course Level 1
on Video or DVD

"A verb of more than one word is called a Verb Phrase. A verb phrase contains a principal verb and one or more auxiliary verbs."

As Marie beach combs along the shore she finds things to inspire sample sentences that give examples of principal verbs and auxiliary verbs. She explains that an auxiliary verb helps the principal verb to express the time of the action, and provides a list of auxiliary verbs in their present, past, and future tenses. She also shares an example that shows how a verb may be an auxiliary verb at one time, and a principal verb at another.