do-insertion

do-insertion (omskrivning med to do): also referred to as do-periphrasis or do-support. In forming interrogative sentences, English puts a form of do in front of the subject if there is no other auxiliary in the sentence. (Did you sleep well?) Similarly, in forming negative sentences, English attaches the negator not to the auxiliary do if there is no other auxiliary. (She doesn't want to come.) Do -insertion also occurs in declarative sentences to mark special emphasis (They really did turn up in the end), and in cases of subject-auxiliary inversion when there is no other auxiliary. (Not a single note did they miss.)