This document provides examples of using "so" and "neither" to agree with statements made by others. When agreeing with affirmative statements, "so" is used, such as "Tom likes tennis, so do I." When agreeing with negative statements, "neither" is used, such as "John isn't a doctor, neither am I." A quiz with sample statements is included to reinforce when to use "so" versus "neither" in agreeing with others.