
Essential guide and practice for independent study: Grammar is powerful: Make minor changes to a verb and you will express doubt, courtesy, irony, non-reality and an abundance of time relations. Master the use of single words as well as complex sentences to reach your goal: to...

Essential guide and practice for independent study: Grammar is powerful: Make minor changes to a verb and you will express doubt, courtesy, irony, non-reality and an abundance of time relations. Master the use of single words as well as complex sentences...