What is the purpose of this book? How is this book organized? What are the Common sources of errors in English? How should you use this book? (Teachers) How should you use this book? (Self-Learners) What benefits do the exercises provide? What terms should you know before using this book? Common Error List Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 Exercise 7 Exercise 8 Exercise 9 Exercise 10 Exercise 11 Exercise 12 Exercise 13 Exercise 14 Exercise 15 Answer Key Index