This book is a conscious attempt to meet the specific needs of the graduate students of Bharathiar Universty, Periyar University and Bharathidhasan university students. A student who has just entered the portals of colleges finds it difficult to understand the subjects taught to him/her. This difficulty is mainly due to his/her poor standard of English. While preparing this book the authors had in mind this particular difficulty of our students. This book is written in a very simple and easy style. It is updated and exhaustive in covering the syllabus.