The document discusses verbs and their forms and usage. It explains that verbs assert something about the subject and express actions, events, or states of being. It describes the infinitive form in English and Spanish, and how Spanish verbs are conjugated to express tense, person, and number. It also discusses grammatical tense, verb valency, auxiliary verbs, irregular verbs, and other verbal forms like participles, infinitives, gerunds, and their meanings and usage.