modal verbs

Modal verbs are auxiliary verbs that express possibility, ability, permission, obligation, or certainty. Common modals include can, could, may, might, must, shall, should, will, and would. They modify the main verb to convey the speaker's attitude or the situation's likelihood or necessity. For example, "can" indicates ability, as in "I can swim," while "must" signifies obligation, as in "You must finish your homework." Modals do not change form for tense but can combine with other verbs to add meaning and nuance to sentences.