If you are looking for a book that will help you to improve your English, then this is the book for you. As well as being a grammar guide, “English Grammar reference” is also an Error Correction book. It deals with the most common errors among students of all nationalities. Errors which begin to sound 'normal' to learners if nobody ever corrrects them. Most errors are due to 'mother tongue' interference. This is when the student translates literally from his/her own language.