This document discusses the use of infinitives and gerunds (verb + -ing form) in English. It provides examples of when to use each form after certain verbs and prepositions. The -ing form is used after verbs like enjoy and prepositions like in, while the infinitive (with or without "to") is used after verbs like want. In some cases either can be used with little change in meaning, but sometimes the meaning differs depending on the form. The document provides a detailed table to help explain when to use infinitives and gerunds.