Basic English Grammar Structures and Vocabulary: A Short Course in English for Adult Students" by Prof. Juan Gmo. Moya Montaña is a comprehensive self-study manual designed to facilitate English language learning for adult students. The book offers a structured approach to understanding fundamental English grammar and vocabulary, tailored to real-life situations relevant to adult learners. It is organized into 21 units, covering topics such as verb tenses, articles, pronouns, adjectives, prepositions, and vocabulary related to people, time, places, activities, and objects.