Indicates obligation or necessity to do something, meaning 'must' or 'have to'.
When to use
Expressing obligation, Giving advice, Explaining rules, Everyday conversation
The nuance
Attach '-아야 돼요' or '-어야 돼요' to the verb stem depending on whether the stem vowel is 아/오 or others. This pattern expresses obligation or necessity. For example, 가다 → 가야 돼요, 먹다 → 먹어야 돼요.
