Thomson and Martinet's classic grammar is the most widely used book of its kind. It is popular because its explanations are clear and becouse it deals thoroughly with the topics which students find most difficult. It is intended for internediate and post-intermediate learners, but it also a useful source of reference for more advanced students and for teachrs. 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, preposotions, conjunctions, auxiliary verbs, the infinitive and the passive. A n