This document discusses commands and prohibitions in language. It provides examples of different structures used to form commands, including bare infinitives (e.g. "Stand up!"), "be + non-verb" (e.g. "Be careful!"), and using "please" to make commands more polite. Prohibitions are expressed using "Don't + bare infinitive" (e.g. "Don't lie to me!"), "Don't + be + non-verb" (e.g. "Don't be lazy!"), and "No + verb-ing" (e.g. "No smoking!"). Various examples of commands and prohibitions are given in different structures.