This document provides guidance on subject-verb agreement in English. It discusses: 1. Using the third person singular '-s' ending on verbs like 'drinks' when the subject is a singular third person noun or pronoun like 'she', 'he', or a name. 2. How the verbs 'be', 'have', and 'do' have special forms ('is', 'are', 'has') in the third person singular present tense. 3. Subject-verb agreement rules when subjects are joined by 'and', 'or', 'either/or', or 'neither/nor'. 4. Identifying the true subject of a sentence when it is separated from the verb by