There was not enough practice for anything in this book to actually learn it. Furthermore, what practice there was often had multiple correct answers, or even our teacher couldn't figure out what was the right answer. Descriptions of grammar, especially in later chapters didn't match how the same verb tenses were used in written material that I've seen outside of the book, and I wound up unsure what some of them actually meant. Also, this book was incredibly expensive, and not worth what it sells for anymore. I bought it when it was half that price, and I still feel like I got ripped off.