Book excerpt: This book is written to provide the Mongolian language students a reference book of English explanations for the Mongolian grammar system. Each area of Grammar is explained in simple English and then several examples are given. There are significant differences between spoken Mongolian and written Mongolian. We will attempt to point out the grammatical differences as we study them. If the Mongolian language teacher uses this book when teaching Mongolian grammar, it will help them give good English explanations. Even though the teacher may not know the English grammar terms, the teacher can use this book because we have given the English and Mongolian grammatical terms. It is our hope that this book will help the beginning, middle and advanced Mongolian language learners in addition to those that are studying the differences between the Mongolian and English languages. I would like to thank all my Mongolian language teachers and especially T. Uranchimeg and P. Yandii for their help in writing this book.