Richmond’s mnemonic “AT for specific times (at 5 PM), ON for days/dates (on Monday), IN for longer periods (in July)” is taught worldwide. The PDF’s table of exceptions (e.g., “at night” but “in the morning”) is a lifesaver.
While there are various grammar titles associated with Richmond Publishing (a renowned name in ELT—English Language Teaching), the term "Simplified Grammar" usually refers to texts designed to bridge the gap between basic literacy and intermediate fluency. the richmond simplified grammar of english pdf
The keyword is searched hundreds of times each month. Why the intense interest? Richmond’s mnemonic “AT for specific times (at 5
If you meant a different grammar book (e.g., A Simplified Grammar of the English Language or Richmond Pocket Grammar ), let me know, and I can refine the search. ON for days/dates (on Monday)