The document discusses the differences between using infinitives and gerunds after certain verbs and verbal phrases. It provides examples of verbs that are commonly used with gerunds or infinitives, including verbs used with prepositions. Some verbs can be used with either a gerund or infinitive but will have different meanings depending on which form is used. The document also shows the different forms the gerund and infinitive can take, such as present, past, perfect, and continuous tenses in both active and passive voice.