This document provides guidance on properly using irregular verbs in English. It explains that irregular verbs have unpredictable formations for their simple past and past participle forms, unlike regular verbs which always take an "-ed" ending. The document then lists numerous irregular verbs and their forms to help writers avoid common mistakes like using the wrong tense. It emphasizes learning to distinguish between the simple past and past participle forms, as they can differ for irregular verbs. Examples are given to illustrate proper usage of irregular verb forms in sentences.