Modal verb. A modal verb is a type of auxiliary verb that is used to indicate modality – that is, likelihood, ability, permission, and obligation.
Examples include the English verbs can/could, may/might, must, will/would, and shall/should.
2 4 2
Modals are the verbs used to express mood manner or expression of the sentence.
some commonly used modals- can, could ,shall ,should ,will ,would ,may, might etc. 

hope it helps:-)

mark as brainliest answer.

1 5 1