This document discusses rules for subject-verb agreement in English grammar. It explains that a singular subject requires a singular verb, while a plural subject requires a plural verb. Some key points covered include: the role of "of" in determining the subject; verbs agreeing with subjects connected by "and", "or", "either/or", or "neither/nor"; subjects separated from verbs by words like "along with" or "as well as"; verbs agreeing with subjects in parentheses or sentences beginning with "here" or "there"; verbs agreeing with collective nouns depending on intent; and the use of the subjunctive mood to express hypothetical or imaginary situations.