This document discusses the differences between gerunds and infinitives. Gerunds are verb forms ending in "-ing" that can function as nouns, subjects, or objects of prepositions. Some verbs like "enjoy" and "go" only take gerunds. Infinitives use "to" before the base verb form and can be subjects, objects of prepositions, or express purpose. While gerunds often follow verbs indicating simultaneous action, infinitives follow verbs indicating potential future action. Both gerunds and infinitives can act as nouns, taking singular verbs when subjects.