This document discusses the three main types of verbs: action verbs, linking verbs, and helping verbs. Action verbs describe what the subject is doing and can take objects. Linking verbs connect the subject to a noun or adjective in the predicate and show what the subject is or is like. Helping verbs help out the main verb and are used to express tense and voice. The document provides examples and explanations to distinguish between the different verb types.