>when i can use a modals??tell me please. = REWRITE: When can I use modals? Tell me please. ANSWER: Anytime you want to. You just used one--"can." Modals are also called auxiliary verbs or helping verbs. Modals often help you to express ability, permission, intention to complete, obligation, necessity, habitual action, or possibility. Examples of modals are "can," "could," "do," "have," "may," "might," "must," and "would." One thing to watch out for is modals like "could" and "would" can be used in the present or the past. For example, "Could I get a hamburger and soda, please?"