Thomson and Martinet's classic grammar is the most widely used book of its kind. It is popular because its explanations are clear and because it deals thoroughly with the topics which students find most difficult. It is intended for intermediate and post-intermediate learners, but is also a useful source of reference for more advanced students and for teachers. A Practical English Grammar has now been revised and reissued in a fourth edition. The text has been rewritten in many places to bring it up to date. Some material has been rearranged to make it simpler for the reader to compare related topics. There is fresh or fuller treatment of many subjects, notably in the chapters on nouns, adjectives, adverbs, prepositions, conjunctions, auxiliary verbs, the infinitive and the passive. A new index contains many more entries and now includes references to every important structural word. These changes, and an improved design, make A Practical English Grammar more informative and easier to consult than ever. The following titles are recommended for use alongside the Grammar: - A Practical English Grammar: Exercises 1 and 2 (also available in low-priced editions). - A Practical English Grammar: Structure Drills 1 and 2.