This book is written on the bases of research conducted to identify the patterns of turn taking and functions of code switching in foreign language English classroom group work interaction. It has assessed the roles of turn taking and functions of codes switching in empowering learner interaction during group discussion.The book will be an important asset for learners of English as a foreign language to be effective language users in time of conversation.It will also have a great value to help learners understand how conversational discourse may affect the language use.The author believes that this book will pave the way for readers to understand the practice of second/foreign language discourse in country's like Ethiopia.