This document provides information on gerunds and infinitives in English. It discusses how gerunds are used like nouns and after prepositions. Infinitives are used to express purpose or reason. Certain verbs are followed by gerunds or infinitives with or without changes in meaning. The differences between "remember/forget/regret" and "see/hear/feel" depending on gerund or infinitive are also explained. The uses of "used to", "would", "be used to" and "get used to" are covered.