Hello, people of the community, I have a question: "what is the best book for a teacher about English Grammar?"
Please if you have a link to a book, please share it.
Thank you in advance.
I would recommend Oxford Living Grammar or Mygrammarlab. I think they are great in content and not too boring for a textbook.
Good luck! Let me know if you have any other questions.
I think one of the most important reference books, with exercises, is the Azar Understanding and Using English Grammar, and the basic and intermediate versions as well. http://www.azargrammar.com/materials/uueg/UUEG_TchrCreated.html
Practical English Usage by Michael Swan
Teaching English Grammar by Jim Scrivener
Note that these are reference books, not textbooks.