The document discusses the imperative form of verbs. The imperative is used to give commands and orders without a subject. Examples are given such as "Open your mouth" and "Walk to the corner." Although imperatives have no grammatical subject, the understood subject is "you." The form remains the same whether addressing one or more people. Imperatives can be used to give orders, instructions, advice, warnings, offers, or invitations. Negative imperatives use "do not" or "don't." The "let's" form includes the speaker.