The document lists irregular verbs in English grouped by their conjugation patterns. It includes 9 groups of irregular verbs with their infinitive, past tense, and past participle forms. The groups cover verbs that do not change form (group 1), those that add endings (group 2), those with vowel changes (groups 3-5 and 7-8), and those with other unpredictable changes (groups 6 and 9).