This learning material contains volumes 3 and 4. You will again undergo a series of exercises and will improve your grammar. Grammar is the science of word-formation, and the next important step to internalize them is to learn the different types and usages of verb tense, verbal patterns, and sentence patterns. As most mastery requires a significant amount of practice, the same way is true in grammar. It requires skills. Inside this book, you will have grammar exercises, cumulative assessments, and post-tests. Do not worry. You can always check your answer on its key to correction and a score-table. This book is a self-directed study.