A verb expresses an action, condition, or state of being. There are different types of verbs including transitive verbs which take an object, intransitive verbs which do not, action verbs which show physical or mental actions, and linking verbs which link the subject to a predicate describing a state of being. Helping verbs are auxiliary verbs that combine with a main verb to express tense, mood, or voice. The document provides examples and definitions of these verb types.