This document provides guidance on subject-verb agreement in English grammar. It explains that the verb must match the subject in number, with singular verbs used for singular subjects and plural verbs used for plural subjects. Some exceptions and irregular verbs are noted. Tips are provided such as checking if the subject ends in "s" to determine if the verb also needs an "s". Contexts where subject-verb agreement errors commonly occur, like with compound subjects or questions, are discussed. The importance of properly matching subjects and verbs is emphasized.