This document discusses linking verbs, which connect the subject of a sentence to another word that renames or describes the subject. Linking verbs include forms of "to be" like is, am, are, and were. They show that the subject "is" or "is like" something else rather than showing an action. Examples are provided of sentences containing linking verbs and how to identify them by substituting "is", "am", or "are" for the suspected verb. If the sentence still makes sense, then the verb is likely a linking verb.