Practical Grammar I is intended for elementary learners aiming at progressing to intermediate level and beyond. The workbook is categorically aimed at elementary students who have already studied the very basic structures of English as it concentrates on those structures which elementary students want to use but which often cause challenges and difficulty. It is, therefore, most useful at basic, and elementary levels where all or most of the topics and materials will be relevant. It mainly focuses on the grammatical choices which play important roles for elementary and pre- intermediate understanding of English. This workbook has been designed to contain and discuss a wide range of essential and basic grammar rules to acquaint those who are seeking to improve their elementary knowledge of English grammar with the contents of the book. 'Practical Grammar I' combines reference-style and progressive-grammar explanations with focused practice exercises and activities. The book is not intended to be used by upper-intermediate of higher-level students. 'Practical Grammar I' in many ways is an effective tool for elementary to intermediate learners to master a variety of essential grammar topics in classrooms or by self-studying and on their way toward upper-intermediate level.