Expresses ability or possibility. Uses prospective modifier -(으)ㄹ + bound noun 수 (way/method) + 있다 (exist). Literally: "the way to do exists".

• •Ability: "한국어를 할 수 있어요" (I can speak Korean)
• •Possibility: "내일 비가 올 수 있어요" (It could rain tomorrow)