This document defines and provides examples of the three main types of verbs: action verbs, linking verbs, and helping verbs. Action verbs express physical or mental actions and can be transitive or intransitive. Linking verbs connect the subject of a sentence to a describing word. Common linking verbs include forms of "to be" and verbs like "seem" and "become." Helping verbs assist the main verb of a sentence and can indicate things like tense.