The document outlines the structure of imperative sentences in English. It explains that imperative affirmative sentences use the bare infinitive or "do" form of the verb for the second person singular and plural. For first person plural, "let's" is used followed by the bare infinitive. Negative imperatives use "do not" or "don't" followed by the infinitive for second person or "let's not" for first person plural. Examples are provided to illustrate the different structures.