This document discusses verbs and verb phrases. It explains that verbs can be divided into two categories: lexical verbs and auxiliary verbs. A verb phrase consists of a lexical verb and any auxiliary verbs. The lexical verb is the furthest verb to the right in the phrase. Auxiliary verbs serve grammatical functions and help lexical verbs. There are two types of auxiliary verbs: primary auxiliaries, which are formed from have, do, and be, and modal auxiliaries. The verbs do, be, and have can function as either lexical verbs or auxiliary verbs depending on their use in a phrase. Examples are provided to illustrate lexical verbs, auxiliary verbs, and how do, be, and have can be either.