This streamlined grammar is intended as both a text and a reference book for university level Spanish language courses starting at the junior level. The aim is to simplify and to present cognitive devices for understanding Spanish structures. While written in Spanish, it is especially designed for students whose primary language is English as well as for Spanish speakers who live in an English speaking culture. The book contains 20 grammar units with many accompanying exercises. Topics covered are non-finite verbs, temporal expressions, mood, the particle si, imperatives, linguistic variation, prepositions, copulas, verbal expressions which show changes of form and state, structures based upon the model of gustar, aspect, passive voice, uses of se, uses of lo, comparison, relative pronouns, conjunctions, que/cual contrast, articles, and adjective placement.