Can: Modals of Ability
English Grammar A1 Level: A modal verb is a type of auxiliary (helping) verb that has no meaning on its own but it modifies the main verb, changes its meaning and gives more details about the action. The verb can is a modal verb used to express the idea of ability or opportunity, to express the possibility or impossibility of an event or action happening and to ask for or give permission. https://open.books4languages.com/english-a1-grammar/chapter/can-modals-of-ability