The document provides rules for subject-verb agreement in English. It discusses how the subject of a sentence determines whether the verb is singular or plural. Some key points covered include: singular subjects require singular verbs and plural subjects require plural verbs; verbs must agree with the subject even if other words are between the subject and verb; prepositional phrases usually do not affect agreement; collective nouns and units of measurement often take singular verbs; and the object of certain prepositions like "all" and "some" determines agreement. The document ends with a drill to practice applying the rules of subject-verb agreement.