catenative

catenative ('hjelpeverb'): a part of the verb phrase which is not among the auxiliaries, but it is followed by another verb which functions as the main verb in the verb phrase. Catenatives may have aspectual meanings, denoting the start, unfolding, or end of an action (e.g., stop running, get to like, continue to read), or modal meanings such as certainty and usuality (seem to like, appear to be, tend to occur). Finally, the catenative get may be a marker of the passive voice (get married, get paid), thus serving the same function as the grammatical auxiliary be. Unlike auxiliaries, catenatives require do-insertion   (or the support of another finite operator) in negative and interrogative sentences.