Examining four dichotomies in Spanish, this book shows how to reduce the six to ten rules common in textbooks for each contrast to a single binary distinction. That distinction is a form of totality vs. part, easier to see in some of the dichotomies, but present in all of them. Every chapter is example-driven, and many of those examples come from writing by students. Readers can test out for themselves the explanation at work in the examples provided. Then, those examples are explained step by step. In addition to examples from writing by college students, there are examples from RAE (Real Academia Española), from scholars, from writers, from Corpes XXI (RAE), from the Centro Virtual Cervantes, and from the Internet. Many of those examples are presented to the reader as exercises, and answers are provided. This book was written for teachers of Spanish as a second language (L2) and for minors or majors of Spanish as an L2. It will also benefit teachers and learners of other L2s with some of these dichotomies.