The Penguin Dictionary of English Grammar is a handy reference book that provides clear and concise explanations of English grammar rules and concepts. It covers a wide range of topics, including parts of speech, sentence structure, punctuation, and more. This dictionary also includes examples and usage notes to help you understand how to apply the rules in practice. Whether you are a student, writer, or language learner, The Penguin Dictionary of English Grammar will be a valuable resource for improving your grammar skills and writing effectively.