Practical English Usage, 4th edition: (Hardback with online access)

Practical English Usage is recommended for any teacher, trainee teacher, or advanced-level student looking for answers to questions about the English language. The material is now organised in two parts (grammar and vocabulary), making it easier than ever to find the answers, either online or in print.

Part 1 is a complete practical learner's grammar with 28 sections, covering all the structural points that cause problems for learners.

Part 2
is a guide to vocabulary
problems covering:

The 600+ entries provide answers to the questions that learners typically ask, for example: Plus: