All the grammar, punctuation, and usage rules and examples on the website plus dozens of quizzes with answers. Note: Some English usage rules vary among authorities. For example, the Associated Press (AP) Stylebook is a guide specific for news media and journalists while The Chicago Manual of Style (CMS) is used by many book publishers and writers.
English Grammar Rules Explanation: Grammar knowledge is among essentials in learning a language. Online lessons are very convenient to learn and excel in grammar rules and become more confident in using the language. Choosing between good and well for example, much and many, may or must. Beginners English Lessons. Grammar Practice Exercises.