-는지 알다/모르다
Quick answer: -는지 알다/모르다 means whether, where, what — a question folded inside another sentence.
How to form it
Verb → -는지 · adjective with no final consonant → -ㄴ지 · adjective with final consonant → -은지 · noun → 인지
In Korean: 동사 → -는지 형용사 받침 X → -ㄴ지 형용사 받침 O → -은지 명사 → 인지
What to know
You already know 어디에 있어요? — a direct question. Put it inside -는지 아세요? and it becomes a question you may ask a stranger, because you are asking whether they know rather than demanding the answer. The question word stays where it is: 어디에 있는지, not 있는지 어디에.
Examples
- 영화관이 어디에 있는지 아세요?Do you know where the cinema is?
- 화장실이 몇 층인지 몰라요.I do not know which floor the toilet is on.
- 매장이 어디인지 물어봐요.Ask where the shop floor is.
Where it's taught
HanDa Level 2 (TOPIK I), Lesson 14: 영화관이 어디에 있는지 아세요? — Do you know where the cinema is?. Also in the Level 2 book.
Practise -는지 알다/모르다 out loud
In the HanDa app this is Level 2, Lesson 14 — drills, a speaking check and an AI teacher that corrects what you say. Free for 7 days.