This document provides tips on subject-verb agreement in English grammar. It explains that the verb must agree with the subject in number, so a singular subject takes a singular verb and a plural subject takes a plural verb. Some exceptions are noted, such as compound subjects joined by "and" taking a plural verb, while those joined by "or" can take a singular or plural verb depending on proximity. Indefinite pronouns like "everybody" are always singular. The key to determining subject-verb agreement is identifying the subject and verb and making sure they match in number.