Essential Elements of English Grammar with Answer Key An informative and easy to use grammar book for intermediate to advanced students of English. Essential Elements of English Grammar can be used as a self-study guide or as a classroom textbook. This book covers rules regarding the use of verbs in the English language from verb tenses to verb usage topics such as active and passive voice, auxiliary (helping) verbs, and conditional sentences. The exercises have been thoroughly evaluated to help the student learn and understand each grammar lesson. | Essential Elements Of English Grammar by William Dixon, Paperback | Indigo Chapters