This document provides lessons on English verb forms and usage. It begins by introducing the concepts of V1, V2 and V3 forms of verbs using examples like "eat", "ate", "eaten". It then discusses the different verb formulas like "be + ing", "be + V3", "have + V3", "do + V1" and "modal + V1". Several examples are given for each. The document provides exercises for students to practice filling in missing verbs. It concludes with a note about modal and semi-modal verbs like "can", "may" and "must".