"The grammar reference and practice book for students of American English
Simple explanations, clear examples, and easy-to-understand exercises make this book perfect for both self-study and classroom activities.
• Test yourself and find out your strengths and weaknesses with a simple Study Guide.
• Learn about the grammar and then practice, with explanations on the left-hand page and exercises on the right.
• Improve your understanding with even more exercises in the back of the book.
• Check your answers with the easy-to-use answer key."