The purpose of this book is to help students of foreign language, to understand the
terms, and the rules of grammar usage. It provides information and advice on specific
matters of English usage in order to avoid common errors. we have done our best to
reduce this difficulty by careful listing of the terms. All grammatical terms, whether
traditional or more recent, are therefore carefully explained in the book, where the
students are introduced to the theoretical concepts that help them how to use the rules in
whatever situation. We have included some sentence patterns because a student
generally learns to use a language that he wants to acquire.