This document discusses subject-verb agreement in English grammar. It provides examples of how to determine if a subject is singular or plural and how the verb conjugation changes accordingly. Some key points covered include: - Verbs take -s in the third person singular (he/she/it walks) but drop -s in plural forms (they walk). - There are irregular verbs like be, have, do that don't follow the standard rules. - Subjects joined by "and" are plural so the verb is not conjugated with -s. Subjects joined by "or" can take a singular or plural verb depending on proximity. - Indefinite pronouns like anyone, everyone