of Teaching English is a comprehensive guide to the theories, practices, and techniques of teaching English as a second or foreign language. This book provides a thorough overview of the key concepts, methodologies, and strategies used in teaching English to non-native speakers. The first section of the book explores the theoretical underpinnings of second language acquisition, including theories of language acquisition, interlanguage, and error analysis. This section also covers the principles of language learning and the role of motivation, affec