This document provides information on the uses and formation of gerunds and infinitives in English. It explains that gerunds and infinitives can function as nouns, subjects, objects, or subject complements. Gerunds are formed with the "-ing" suffix added to the base verb form, while infinitives use "to" plus the base form. The document outlines the different verbs and prepositions that can take gerunds or infinitives as complements, and notes some verbs that can take both but with subtle meaning differences. It also discusses the passive, perfect, and progressive forms of gerunds and infinitives.