This document discusses subject-verb agreement rules in English grammar. It provides definitions of subjects and explains that the subject of a sentence determines whether the verb is singular or plural. Key points covered include:
- Subjects can be singular or plural nouns, pronouns, phrases or clauses.
- Verbs must agree in number with their subjects.
- Compound subjects connected by 'and' take a plural verb, while those connected by 'or' or 'nor' can take a singular verb depending on the closest subject.
- Collective nouns can be singular or plural depending on their meaning in context.
- Measurements, proper nouns, and subjects preceded by determiners like 'all'