This document discusses subject pronouns in Spanish and their English equivalents. It explains that "tú" is used informally for friends and colleagues while "usted" is more formal and used with seniors, teachers, and bosses. It also defines the plural pronouns "nosotros/nosotras" as we, "vosotros/vosotras" as you all, and "ellos/ellas" as they, noting whether they refer to masculine, feminine, or mixed groups.