This document discusses subject-verb agreement in English. It explains that verbs must agree with their subjects in number - singular verbs match singular subjects and plural verbs match plural subjects. Some key points covered include: - Nouns and pronouns can be singular or plural - Verbs change form depending on whether the subject is singular or plural - Indefinite pronouns like "anyone" can be singular or plural depending on use - Compound subjects joined by "and" are plural, those joined by "or/nor" can be singular or plural depending on the parts of the subject.