The document discusses the difference between gerunds and infinitives. A gerund is a verb form ending in "-ing" that functions as a noun, such as "swimming" or "reading". An infinitive is the basic verb form preceded by "to", such as "to swim" or "to read". Gerunds are used to describe real or completed actions, while infinitives describe potential or unreal actions. The document provides examples of verbs that can be followed by gerunds or infinitives and explains how the meaning may change depending on which form is used.