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. ... Modal verbs add meaning to the main verb in a sentence by expressing possibility, ability, permission, or obligation.

Modal verbs are auxillary verbs ,also called helping verbs, examples-like,can , could,shall,must,might ,and should.