This document discusses subject-verb agreement in English grammar. It provides examples of singular and plural subjects and verbs. Key points covered include: - Verbs must agree with their subject in number - singular verbs with singular subjects and plural verbs with plural subjects. - There are irregular verbs like "be", "have", and "do" that have unique plural forms. - Verbs take an "s" ending with singular subjects not ending in "s" and drop the "s" ending with plural subjects. - Subjects joined by "and" or referents like "nobody" are always plural so the verb does not take an "s".