This document provides information about Spanish grammar concepts including: - The preterite and imperfect tenses and how to conjugate -ar, -er, -ir and irregular verbs in these tenses. - Common words that indicate when to use the preterite or imperfect. - Comparatives and superlatives and how they are formed. - Verbs like gustar and how they are used. - The future tense and irregular verb conjugations. - Uses of the words "por" and "para" and their different meanings.