In this book I have tried to look at grammar, as it affects the teaching of English as a Foreign and Second Language, from every possible angle, from all kinds of grammatical description, both scientific and pedagogic, from syllabus and material design, from teaching and testing. My aim overall has been to bring all these various enterprises together, to ‘join up the dots’, as I said in the Introduction – a task which has not been attempted before – and to show how they all relate to one another. All the fields that are involved in ‘doing English grammar’ – including some which would not normally be included – have been covered, though in some cases it has only been possible to give partial coverage – the fields are so extensive.