This document discusses indefinite pronouns and their singular and plural forms. It provides examples of singular indefinite pronouns like "everybody", "nobody", and "either". Plural indefinite pronouns include "several", "few", and "both". Some pronouns like "some", "all", "most", "none", and "any" can be either singular or plural depending on their antecedent or accompanying noun. The document concludes with examples that practice using indefinite pronouns correctly in sentences.