Question

what model auxiliary and which are they answer in one word​

Answer 1

Modal verbs are auxiliary verbs (also called helping verbs) like can, will, could, shall, must, would, might, and should. After a modal verb, the root form of a verb is generally used. The word to should not appear after a modal verb. An exception is the phrase ought to, which is considered a modal verb.

Answer 2

Answer :-

Modal auxiliary verbs include: can, could, may, might, must, ought, shall, should, will, and would. These verbs - which never change forms the way most other verbs do - indicate possibility, capability, necessity, or willingness.