The document discusses the differences between using to-infinitives and gerunds after verbs and in other contexts. To-infinitives are used to describe future events, after modal verbs, and with certain verbs like "want" and "expect." Gerunds are used as subjects and objects, after verbs like "enjoy" and "finish," and with prepositions. Some verbs can take both a to-infinitive and gerund with either no change in meaning or a difference regarding general vs. specific situations.