I am pretty sure that anyone who has either learnt English as a student or been a teacher even for a short period of time must have come across the English Grammar in Use series by Raymond Murphy. Apparently, they are one of the best selling grammar books of all time. Go into a staff room and you will more than likey see three or four copies on the shelves. When a student tells you that he has a grammar book, it is very likey that it will be...