미안, 나 지금 가야 해

The line, explained

The date is going perfectly until the phone lights up. One glance at the screen, and then: 미안, 나 지금 가야 해. 'Sorry, I have to go now.' The other person is left alone with two coffees, and the episode has its cliffhanger. The grammar doing the work here is -아/어야 해, Korean's 'have to'. It is one of the most practical patterns you can learn, because life is full of things you must do.

미안 is the shortest way to say sorry. It is clipped from 미안해, which comes from 미안하다, to be sorry. Saying just 미안 is very casual, the kind of quick apology you toss to a close friend while already reaching for your coat. 나 is 'I', and 지금 is 'now'. In casual speech the subject marker after 나 often disappears, and the time word sits right in front of the verb.

가야 해 is the heart of the line. 가다 is to go; its stem 가 has the vowel ㅏ, so it takes -아야, and 가 plus 아야 merges into 가야. Then comes 해, from 하다. Other verbs: 먹다 → 먹어야 해, have to eat; 일하다 → 일해야 해, have to work. The ending -아/어야 on its own means 'only if', so the whole thing literally says 'only if I go does it work out'.

You can change the last part to adjust the tone and time. 가야 돼 means almost the same and is just as common; 돼 comes from 되다, to work out. 가야 해요 is polite. 가야 했어 means 'I had to go', a line often said later, when the explanation finally comes. And to say 'you don't have to', switch to a different pattern: 안 가도 돼. Korean expresses obligation and permission with matching shapes.

Say it with an apologetic wince: mi-an, a little pause, then na ji-geum ga-ya hae, already halfway out the door. Now give yourself other excuses: 미안, 나 지금 자야 해, sorry, I need to sleep; 미안, 나 지금 일해야 해, sorry, I have to work. Or use it for the things you keep putting off: 나 진짜 공부해야 해, I really have to study. You will say that one often.