This document provides information on using the verb "ser" in Spanish. It begins by introducing subject pronouns and the conjugations of "ser". It then provides examples of how to form sentences using "ser" by matching the subject pronoun to the correct conjugated form. The document explains that "ser" is used to describe characteristics, possessions, times, dates, identities, nationalities and professions. It provides practice sentences for students to fill in the correct form of "ser". Finally, it notes that to make a sentence negative, "no" is placed before the conjugated form of "ser".