This document discusses language and grammar. It defines language as spoken or written communication using words and grammar. Grammar consists of parts of speech, including nouns, pronouns, verbs, adjectives, adverbs, conjunctions, prepositions, and interjections. The document provides examples of each part of speech and how words are combined to form sentences using different grammatical structures like noun-verb and adjective-noun. Understanding grammar allows us to be sure of how to correctly structure language.