A label for the main use (or discourse function) of an interrogative clause. For example, Will you dance with me? is an interrogative structure which can be used as a question to elicit either a ‘yes’ or ‘no’ response. Other clause types can also be used to ask questions, e.g. the declarative clause You will dance with me? This would normally be used to make a statement, but can be used as a question if it is pronounced with a rising intonation.