This document lists and defines irregular verbs in English. It provides the infinitive form of each verb, its past simple form, and past participle. Some examples of irregular verbs included are "to be" which is "was/were" in the past simple, "to buy" which is "bought", and "to teach" which is "taught". The document serves to help students learn the unique past tense forms of irregular English verbs that do not follow standard past tense conjugation rules.