Should/Must

Express necessity or obligation: Formation (same as present conjugation + 야): • ㅏ/ㅗ stems + 아야 하다: 가다 → 가야 해요 • Other stems + 어야 하다: 먹다 → 먹어야 해요 • 하다 → 해야 해요 Variations: • -아/어야 하다: must, have to (강한 의무) • -아/어야 되다: should, need to (slightly softer) • Both are used interchangeably in speech Examples: • 숙제를 해야 해요 = I have to do homework • 일찍 일어나야 돼요 = I need to wake up early Question form: • 뭘 해야 해요? = What should I do? • 가야 해요? = Do I have to go?