Question

Pick out the modal auxiliary and state its function:

Could you have done it.​

Answer 1

Answer:

Modal auxiliary : Could

Function : Ability

Answer 2

Answer:

A modal auxiliary verb, often simply called a modal verb or even just a modal, is used to change the meaning of other verbs (commonly known as main verbs) by expressing modality—that is, asserting (or denying) possibility, likelihood, ability, permission, obligation, or future intention.