Study these 27 easily understandable English grammar lessons! Professor Winn, a veteran English teacher, hand selects lessons that have frustrated his own students with big grammar doubts. He created 27 Keys to Better English Grammar because he knows both students and professional need a resource that presents English grammar without the rigid rules of other textbooks. Better English grammar should not be difficult! Use the exercises after each lesson to check your understanding. Well-designed and authoritative, both students and professionals can use this great resource for everyday use. Indeed, 27 Keys to Better English Grammar is a reference, study aide for exams, or perfect classroom text. From the present perfect simple to the past subjunctive and relative clauses (restrictive, non-restrictive) to verbs/adjectives/nouns and prepositions, start today to improve your English grammar! Finally, take control and answer your serious questions about English grammar. Avoid costly grammar mistakes in your letters, memos, or research papers today!