The three types of non-declaratives viz. interrogatives, imperatives, and exclamations, are characterized and analyzed together as a single class. The notions of declaration and presupposition are defined and shown to be applicable to both declaratives and non-declaratives. A defining characteristic of non-declaratives is that only strong intensional operators can apply to them to form complex sentences, and this is shown to imply that they do not have declarations. One case of the relation between questions and conditionals is studied in detail.