yes-no-interrogative 

yes/no-interrogative  (spørresetning uten spørreord): a sentence type marked by inverted word order (usually subject-auxiliary inversion - unless the verb is a simple form of to be or - less frequently - to have). E.g. Is your mother at home? Have you done your homework? Will he understand this? The typical communicative function of a yes/no -interrogative is a yes/no-question, though other functions are possible, e.g. request (can you lend me a pound, please?).