TOPIK II · LEVEL 5

-나 싶다 / -(으)ㄴ가 싶다

It expresses a tentative thought or doubt in your own mind, like 'I wonder if…' or 'maybe…', often with a touch of worry.

추측·판단Guessing & judging

Han: The possible slip of the tongue happened yesterday, so the guess itself needs the past tense: 했나 싶다. 하나 싶다 would mean wondering whether you are making a slip right now.

Examples

요즘 잠을 너무 못 자서 이러다 병이 나는 게 아닌가 싶어요.I've been sleeping so badly lately that I'm afraid I might get sick at this rate.
혹시 제가 말실수를 했나 싶어서 계속 신경이 쓰였어요.I kept worrying, wondering whether I had said something wrong.
창밖이 조용해서 비가 그쳤나 싶어 나가 봤어요.It got quiet outside, so I thought the rain might have stopped and went out to check.
처음에는 일이 너무 어려운가 싶었는데 해 보니까 할 만했어요.At first I wondered if the work was too hard, but once I tried it, it was manageable.

Don’t mix up

-나 싶다 / -(으)ㄴ가 싶다vs-나 보다-나 보다 states a conclusion drawn from evidence; -나 싶다 voices your own uncertain thought, often leading to an action: 불이 꺼졌네요. 다들 퇴근했나 봐요. vs 다들 퇴근했나 싶어서 사무실에 가 봤어요.
-나 싶다 / -(으)ㄴ가 싶다vs-(으)ㄹ까 싶다-(으)ㄹ까 싶다 is about something not yet done (a plan or a future worry); -나 싶다 guesses about a present or past situation: 주말에는 집에서 쉴까 싶어요 (I'm thinking of resting at home).-나 싶다 / -(으)ㄴ가 싶다vs-고 싶다-고 싶다 means 'want to'; -나 싶다 has nothing to do with wanting, only with guessing: 집에 가고 싶어요 (I want to go home) vs 벌써 집에 갔나 싶어요 (I wonder if he's already gone home).

How to build it

V / 있다·없다+나 싶다
A+(으)ㄴ가 싶다
N+인가 싶다
past: V/A+았/었나 싶다

오다 → 오나 싶다, 비싸다 → 비싼가 싶다, 학생이다 → 학생인가 싶다, 끝나다 → 끝났나 싶다

  1. If you are guessing about something that already happened, put the past tense inside the guess (했나 싶다). The tense on 싶다 (싶었다) only shows when you had the thought.
  2. In standard usage, adjectives and 이다 take -(으)ㄴ가/인가 싶다 (비싼가, 학생인가), while verbs and 있다/없다 take -나 싶다. In casual speech, -나 with adjectives is also heard.
  3. In conversation it usually voices the speaker's own thought; it is not used to ask the listener a question (not: 비가 오나 싶어요?).
  4. It very often appears as -나 싶어서 (the thought led to an action) or -나 싶었는데 (the guess turned out wrong); -는 게 아닌가 싶다 softens a worry or opinion.

Classic mistake

Wrong: 혹시 제가 어제 말실수를 하나 싶어서 전화로 사과했어요.

Right: 혹시 제가 어제 말실수를 했나 싶어서 전화로 사과했어요.

The possible slip of the tongue happened yesterday, so the guess itself needs the past tense: 했나 싶다. 하나 싶다 would mean wondering whether you are making a slip right now.

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