subject–auxiliary inversion

subject–auxiliary inversion (inversjon av subjektet og et hjelpeverb): the placement of an auxiliary in front of the subject.  (Do-insertion is used if there is no other auxiliary in the verb phrase.) Interrogative sentences regularly have subject-auxiliary inversion unless the verb is a simple form of to be. In declarative sentences, subject-auxiliary inversion occurs after certain fronted elements: negative or restrictive element, so +adjective/adverb. E.g. Not a single note did she miss. Only here did he feel at home. So weak did he feel that he didn't get up for a week.