A Practical English Grammar 4th Edition by A. J. Thomson, A. V. Martinet

A Practical English Grammar is intended for intermediate and
post-intermediate students. We hope that more advanced learners and
teachers will also find it useful.
The book is a comprehensive survey of structures and forms, written in
clear modern English and illustrated with numerous examples. Areas
of particular difficulty have been given special attention. Differences
between conversational usage and strict grammatical forms are shown
but the emphasis is on conversational forms.
In the fourth edition the main changes are as follows: