This book is the first in a series of books exploring aspects of grammar, vocabulary, pronunciation and spelling which are often neglected by standard textbooks, grammar books and vocabulary practice books. These exercises are intended both for classroom use and for self study. They are particularly useful for teachers to follow up grammar or vocabulary which has been presented and practised in the classroom. Equally, self-motivated students can use them for self-study. Our website, www.eflworksheets.com, has over ninety free materials for downloading and printing along with exercises which are completed online. The purchase of this book gives you an automatic subscription to interactive exercises based on the exercises in this book. Just email email@example.com, and you will receive a reply requesting some information from the book. Simply reply with the required information to get an identity and password for unlimited access to these activities.