I don't know if you're a native speaker or not but for non-natives I think English Grammar In Use is great for initial study and then reference later. It cover

I don't know if you're a native speaker or not but for non-natives I think English Grammar In Use is great for initial study and then reference later. It covers almost all patterns that are actually used in English without getting stuck on old forms or giving overly strict rules that people don't actually follow.