This document discusses subject-verb agreement in English grammar. It covers basic rules such as singular subjects requiring singular verbs and plural subjects requiring plural verbs. It also addresses exceptions and tricky cases involving pronouns, compound subjects, fractions, and modifiers that can confuse subject-verb agreement. The document is authored by Ayyaz Qadeer and dated February 18, 2014. It includes examples and a quiz to test understanding of subject-verb agreement rules.