This document discusses rules for subject-verb agreement in English. It explains that the verb must agree with the subject in number, so singular subjects take singular verbs and plural subjects take plural verbs. Some specific rules covered include: use present tense when discussing fictional events; words between the subject and verb do not change the subject's number; collective nouns can be singular or plural depending on use; subjects joined by "and" are plural while subjects joined by "or" or "nor" take a verb agreeing with the last subject. The document provides examples and practice problems to illustrate these rules of subject-verb agreement.