practical english usage, 4th edition: michael swan's guide to problems in english (with online access)

Completely revised and updated to reflect changes in language use. NEW Organisation into two easy-to-use parts, making it quicker to find the information you want. Part 1 is a complete topic-by-topic student's grammar, with section introductions highlighting common mistakes. Part 2 is a guide to key vocabulary topics, including an A-Z list of common word problems. NEW Also available online, including 87 diagnostic tests.