Modal verbs The modal verbs are: can may must shall will could might should would Will points to the future from the present: Ken knows that he will win someday. Would points to the future from the past: Ken knew that he would win someday We use modals to show if we believe something is certain, possible or impossible : My keys must be in the car. It might rain tomorrow. That can't be Peter's coat. It's too small. We also use them to do things like talk about ability , ask permission , and make requests and offers : I can't swim. May I ask a question? Could I have some tea, please? Would you like some help? : One definition of modal from M-W - of, relating to, or constituting a grammatical form or category characteristically indicating predication of an action or state in some manner other than as a simple fact possibility, ability, permission, o...