This document provides an overview of verbs in English. It defines a verb as an action, being, or having. Verbs are considered the heart of a sentence because a sentence must contain a verb. There are two main types of verbs: main verbs and auxiliary/helping verbs. Auxiliary verbs include forms of "to be", "to have", "to do", and modal verbs. The document discusses how to identify auxiliary verbs and distinguishes between finite and non-finite verbs. It concludes by defining the three types of non-finite verbs: infinitives, gerunds, and participles.