... intermediate and advanced level grammar books in the future – so sign up for the e-mails to get news about books, courses, and other products This Grammar e-Book is free – so please share it ... listening, vocabulary, grammar, and practice exercises If you have a question, you can contact the teacher This book teaches beginner -level grammar topics with links to grammar exercises on the ... Simple……………………………………………………………………………… 10 Can / Can't / Have to / Don't Have to………………………………………… 14 Prepositions: In, At, On………………………………………………………………… 15 Past Simple: To Be………………………………………………………………………… 17 Past Simple:...