Interrogative
An interrogative sentence asks a question and hence ends with a question mark. In speech, it almost universally ends in a rising inflection. Its effort is to try to gather information that is presently unknown to the interrogator, or to seek validation for a preconceived notion held. Beyond seeking confirmation or contradiction, sometimes it is approval or permission that is sought as well, among other reasons one could have for posing a question. The one exception in which it isn't information that is needed, is when the question happens to be rhetorical (see allofunctional implicature section below). While an imperative is a call for action, an interrogative is a call for information.
- What do you want?
- Are you feeling well?
Read more about this topic: Sentence Function, Communicative Vs. Informative, Informative Sentences