The document defines verbs and discusses their tenses. It explains that verbs tell when an action occurs, and defines the simple present, past and future tenses. It provides basic rules and examples for forming sentences in the simple present tense, including for positive and negative statements and questions. It then discusses the simple past and future tenses, giving examples of how to form sentences in these tenses using verbs. Finally, it lists 10 sentences and asks the reader to identify the verb and its tense in each.