-(으)ㄴ 적이 있다 / 없다: Have (Ever) Done — Experience

When you want to ask "Have you ever been to Jeju?" or say "I've never tried Korean food," Korean does not reach for its past tense. It uses a dedicated experience construction: -(으)ㄴ 적이 있다 ("have done / have had the experience of doing") and -(으)ㄴ 적이 없다 ("have never done"). The heart of it is another bound noun — 적, meaning "an occasion, a time, a past instance" — and once you see that, the logic is transparent: 간 적이 있어요 literally says "there exists a past occasion of having gone."

The construction

Attach the past modifier -(으)ㄴ to the verb, add the bound noun 적 with the subject particle 이, then 있다 or 없다:

The modifier follows the standard past-modifier rule — vowel stems take -ㄴ (간, 본), consonant stems take -은 (먹은, 들은, with 듣다 showing its ㄷ-irregular 들은). The full mechanics of forming -(으)ㄴ live on the past modifier -(으)ㄴ; here we care about what the whole package means.

Note that 적이 is very often reduced to just 적 in speech, with the particle dropped: 본 적 있어요? is completely natural and extremely common.

The reframing: experience, not a report of one event

This is the whole reason the page exists. English uses "have + past participle" for the experiential perfect ("Have you ever eaten sushi?"), and it uses the simple past for a specific reported event ("I ate sushi yesterday"). Korean draws exactly the same line — but with two entirely different structures, and learners constantly use the plain past where the experiential is needed.

Compare these two carefully:

The first pins the action to a time and reports it as a single event. The second lifts the action out of any particular moment and asks only whether it has ever happened — it's about your accumulated life experience. That's why 적이 있다 pairs so naturally with 한 번도 ("not even once"), 예전에 ("once, in the past"), and open-ended "ever" questions, while the plain past pairs with 어제, 작년에, and other fixed time points.

The 보다 pairing — "have you ever tried…?"

In practice, -(으)ㄴ 적이 있다 combines constantly with the auxiliary -아/어 보다 ("try doing," covered on -아/어 보다), giving -아/어 본 적이 있다 — "have (ever) tried doing." This is the default way to ask about experiences you actively sampled: eating a dish, visiting a place, playing a sport.

The crucial point: even inside this combination, the modifier on 보다 must be the past -(으)ㄴ. It is 먹어 본 적, because the whole thing is still an experience located in the past — never ×먹어 보는 적 (present modifier) or ×먹어 볼 적 (prospective). The 보다 doesn't change the tense logic; the experience is over, so the modifier is past.

A related but distinct pattern, -아/어 봤다 ("I tried it / I've done it"), does much of the same work in casual speech and is treated on the -아/어 보다 page; -(으)ㄴ 적이 있다 is the explicit, unambiguous "at some point in my life" version. For the sibling form -아/어 본 적, you'll also see it discussed under experience in the tense system.

Common Mistakes

1. Using the plain past for an "ever" question. A bare past asks about a specific event, not lifetime experience.

2. Using a present modifier with 보다. The experience is past, so 보다 takes -(으)ㄴ.

3. Using the present modifier -는 on the main verb. Experience always takes the past modifier -(으)ㄴ.

4. Mis-forming the past modifier on a vowel stem. 가다 → 간, never ×가은.

5. Using 적이 있다 for a habit or frequency. Experience is whether it has ever happened, not how often you do it.

Key Takeaways

• -(으)ㄴ 적이 있다 / 없다 is the experiential perfect — "have (ever) / have never done" — built on the bound noun 적 ("past occasion").
• It is not the plain past: 갔어요 reports one event; 간 적이 있어요 states lifetime experience. If English allows "ever," use this.
• It combines constantly with -아/어 보다 → 먹어 본 적이 있다, and the modifier on 보다 stays past -(으)ㄴ.
• Use it for whether something ever happened, not for habits or frequency.