This document defines and provides examples of gerunds and gerund phrases. A gerund is a verb form ending in "-ing" that functions as a noun. Gerunds can serve as subjects, direct objects, indirect objects, predicate nominatives, objects of prepositions, and appositives. A gerund phrase consists of a gerund plus any modifiers or objects. The document gives examples of sentences using different gerund forms and functions. It also provides exercises asking the reader to rewrite sentences using gerunds.