-다 보니(까) Grammar in Korean: Meaning and How to Use It

What you'll learn

• Attach -다 보니(까) to any verb stem, including irregular verbs.
• Choose a result clause that fits: a change, a finding or a consequence.
• Tell -다 보니(까) apart from -다가, -아/어 보니(까) and -(으)니까.
• Use the idiom 하다 보니 ("one thing led to another").

Prerequisites: the polite ending -아요/어요 and the pattern -다가. Time: about 15 minutes.

Key facts

• -다 보니(까) means "as I kept doing X, I realised Y".
• The form is the plain stem + 다 보니, with no change for any kind of stem.
• The result grows slowly while the action goes on.
• No tense marker goes inside the first clause.
• The result clause is a finding or a change, and never a command.

Listen to two model sentences.

The next section defines the pattern.

What Does -다 보니(까) Grammar Mean?

-다 보니(까) means "as I kept doing X, I realised Y". A connective ending is a word ending that joins one clause to the next. This connective ending tells the listener, "I did something over and over, or for a long time, and something came out of it."

The pattern has parts that you can see. The 다 is the short form of -다가, which shows that an action is going on. The verb 보다 here means "to see" in the sense of "to find out". The ending -니(까) marks the moment of finding. Together, the parts give the idea "continuing, I found".

Here are two glossed examples.

Revised Romanization (RR) is the national system for writing Korean in the Latin alphabet. It is shown here only as a learning aid.

The next section shows how to build the form.

How Do You Form -다 보니(까)?

The rule is simple. Remove 다 from the dictionary form to get the stem, and add 다 보니. The stem is the verb without its dictionary ending -다. For 먹다 the stem is 먹. Add 까 if you want the longer form.

After a final consonant, the ㄷ of 다 is said as a tense ㄸ, so 먹다 보니 sounds like [먹따 보니]. This tensing happens in speech only. RR does not mark tensing that comes from a neighbouring sound, so it writes meokda boni.

Stems Ending in a Vowel

Vowel stems take 다 directly: 하다 보니, 가다 보니, 보다 보니. There is no contraction. Compare this with -아/어서, where 가 + 아서 becomes 가서.

Stems Ending in a Consonant

Consonant stems also take 다 directly. There is no 으 to insert. This is the same as -다가 and unlike -(으)니까, which adds 으 after a consonant.

Irregular Stems

Irregular stems do not change before 다 보니. An irregular stem is one that changes its shape before an ending that begins with a vowel. 다 begins with a consonant, so the change never happens.

Spoken, 돕다 보니 is [돕따 보니].

With a verb, the pattern describes something you keep doing. Adjectives and 이다 can also take it, with a different shade: a lasting situation that leads to a result, as in 집이 멀다 보니 자주 못 가요 ("My home is far away, so I can't go often") or 학생이다 보니 돈이 없어요. This lesson focuses on the verb use. The next section builds a full sentence.

Worked Example: Building 한국어를 공부하다 보니 재미있어졌어요

Say that Korean became fun as you kept studying. Follow five steps.

1. Write the process. "I study Korean" is 한국어를 공부해요 in the polite style.
2. Find the stem. The dictionary form is 공부하다, so the stem is 공부하.
3. Add 다 보니. 공부하 + 다 보니 = 공부하다 보니. Take away the polite ending, because the ending belongs to the last verb only.
4. Write the result. "It became fun" is 재미있어졌어요. The verb 재미있어지다 means "become fun". The helper 아/어지다 turns a state into a change.
5. Join the two parts. 한국어를 공부하다 보니 재미있어졌어요.

You'll know it worked when the first verb ends in 다 보니 with a space before 보니 and nothing else inside, and the polite ending 요 appears only once, at the end. Try the same steps with "As I exercised every day, I became healthy": 운동하다 gives 운동하다 보니, and 건강해졌어요 follows.

The next section covers what can follow.

Which Tenses and Sentence Types Work with -다 보니(까)?

The first clause is not marked for tense. You never write 공부했다 보니. The result clause shows the time, and it is usually a past change or a present finding.

Spoken, 매일 운동하다 보니 건강해졌어요 is [매일 운동하다 보니 건강해저써요], and 김치를 좋아하게 됐어요 is [김치를 조아하게 돼써요].

What cannot follow is a command or a suggestion. The result clause reports what was found, so a request does not fit. Wrong: 공부하다 보니 쉬세요. If you want to say "Study, then take a break", use -다가: 공부하다가 쉬세요.

Yes/no questions usually end with a rise. A wh-question puts the stress on the question word and often ends with a fall or a rise-fall, rather than a sharp final rise.

The next section compares -다 보니(까) with similar patterns.

How Is -다 보니(까) Different from Nearby Patterns?

Four patterns look alike, but each does a different job.

Look at the helper 보다. In -아/어 보니(까), 보다 means "try", and the finding comes after a single try. In -다 보니(까), the finding comes from keeping on, not from one try. The key question is whether time passed. If you did something for a while and noticed a change, use -다 보니(까). If you did something once and noticed a result, use -아/어 보니(까).

Now compare with -다가. With 공부하다가, you were studying, and something cut it off. With 공부하다 보니, you kept studying, and you ended up with a result. In the first, the studying stops. In the second, the studying goes on.

The next section covers set phrases and edge cases.

Variations and Edge Cases of -다 보니(까)

하다 보니: One Thing Led to Another

The verb 하다 ("do") gives an idiom that you will hear daily. 하다 보니 늦었어요 means "One thing led to another, and I was late." It is a polite way to give a reason without saying exactly what happened. 이야기하다 보니 벌써 열 시가 됐어요 means "As we kept talking, it was already ten o'clock." The RR aid is iyagihada boni beolsseo yeol siga dwaesseoyo.

-다 보면: If You Keep Doing

Change 니(까) to 면 and you get the future partner. 하다 보면 익숙해질 거예요 means "If you keep doing it, you will get used to it." -다 보니(까) looks back at what happened. -다 보면 looks forward at what will happen.

보니 and 보니까

The 까 is optional. 공부하다 보니 and 공부하다 보니까 mean the same. The longer form can sound a little more spoken.

Spacing

This site writes 다 보니 with a space. You will also see the attached form 하다보니 online, but the spaced form is safe in all writing.

Common Result Words

Many results use a small set of words: 늘다 ("increase"), 익숙해지다 ("get used to"), 친해지다 ("become close"), 좋아지다 ("get better"), 알게 되다 ("come to know"). The past of 늘다 is 늘었어요 [느러써요].

The next section lists the mistakes that appear most often.

What Mistakes Do Learners Make with -다 보니(까)?

Learners make six predictable mistakes. Each has a reason and a fix.

Learners often put a tense inside. Wrong: 공부했다 보니 재미있어졌어요. Right: 공부하다 보니 재미있어졌어요. Fix: the pattern is not marked for tense. The result clause shows the time.

Learners often end with a command. Wrong: 공부하다 보니 쉬세요. Right: 공부하다가 쉬세요. Fix: the result clause reports a finding, so use another pattern for requests.

Learners often use it for one action. Wrong: 한 번 먹다 보니 맛있어요. Right: 먹어 보니까 맛있어요. Fix: -다 보니(까) needs time passing or repeated action. For one try, use -아/어 보니(까).

Learners often read the adjective use as "kept doing". With an adjective or 이다, -다 보니 names a lasting situation that leads to a result. Misread: 집이 멀다 보니 자주 못 가요 as "as my home kept being far". Right: "My home is far away, so I can't go often." Fix: with a verb, think "as I kept doing"; with an adjective, think "since it is so".

Learners often use it for an interruption. Wrong: 밥을 먹다 보니 전화를 받았어요 when you mean "I was eating when a call came". Right: 밥을 먹다가 전화를 받았어요. Fix: an interruption takes -다가.

Learners often put the polite ending inside. Wrong: 공부해요 보니 재미있어졌어요. Right: 공부하다 보니 재미있어졌어요. Fix: attach 다 보니 to the bare stem, and put 요 only on the last verb.

The next section gives you practice.

Practice and Answers

Do the four tasks, then compare with the key.

Task 1: join the sentences with -다 보니. Write one sentence for each pair.

1. 저는 매일 운동해요. / 건강해졌어요.
2. 저는 한국에서 살아요. / 김치를 좋아하게 됐어요.
3. 저는 친구와 이야기해요. / 시간이 많이 지났어요.

Task 2: add -다 보니. Write the form of each verb.

1. 듣다 (listen)
2. 만들다 (make)
3. 돕다 (help)
4. 모르다 (not know)

Task 3: fix the error. Each sentence has one mistake. Rewrite it correctly.

1. 일했다 보니 피곤해졌어요.
2. 한국어를 공부하다 보니 쉬세요.
3. 밥을 먹다 보니 전화를 받았어요. (meaning: I was eating when a call came.)

Task 4: write your own. Write one sentence about something that changed as you kept doing it, and one that starts with 하다 보니.

Answer key

1. (1) 저는 매일 운동하다 보니 건강해졌어요. (2) 저는 한국에서 살다 보니 김치를 좋아하게 됐어요. (3) 저는 친구와 이야기하다 보니 시간이 많이 지났어요.
2. (1) 듣다 보니 (2) 만들다 보니 (3) 돕다 보니 (4) 모르다 보니
3. (1) 일하다 보니 피곤해졌어요. (2) 한국어를 공부하다 보니 재미있어졌어요. (3) 밥을 먹다가 전화를 받았어요.
4. Sample answers: 요리하다 보니 실력이 늘었어요. 하다 보니 벌써 밤이 됐어요. Any pair is correct if the first verb ends in 다 보니 and the result shows a change or a finding.

If task 1 was correct, you have the formation rule. If task 3 was hard, check for a tense marker inside the first clause and for commands in the result. The next section points you to what comes after this lesson.

What Should You Learn after -다 보니(까) Grammar?

After -다 보니(까), learn -아/어 보니(까) for a finding after a single try. Then review -다가 to keep "break" and "gradual result" apart.

For a wider view, the parent page Time and Sequence lists every time connector in this group. To plan by level, use Intermediate Grammar.

This lesson covers -다 보니(까) in the polite, casual and formal styles. It does not cover every written variation. About this page. Last updated 2026-10-09. Revised Romanization follows the national rules and is shown only as a learning aid.

Frequently Asked Questions

What Does -다 보니(까) Mean?

-다 보니(까) means "as I kept doing X, I realised Y". It links a continuing action to a result that appeared slowly. 한국어를 공부하다 보니 재미있어졌어요 means "As I kept studying Korean, it became fun." The first part is a process, and the second part is what the speaker found or what changed.

How Do I Attach -다 보니(까) to a Verb or Adjective?

With a verb, remove 다 from the dictionary form and add 다 보니 or 다 보니까. 먹다 becomes 먹다 보니, 공부하다 becomes 공부하다 보니 and 듣다 becomes 듣다 보니. Nothing changes for final consonants or irregular verbs. Write a space before 보니. Adjectives and 이다 can take it too, meaning "since it is so", as in 집이 멀다 보니.

Can -다 보니(까) Be Used in the past Tense?

You do not put 았/었 inside the first clause, so 공부했다 보니 is wrong. The pattern itself is not marked for tense. The result clause usually shows the time, and it is often past: 재미있어졌어요. A present result is also fine, as in 살다 보니 이런 일도 있어요.

Is -다 보니(까) Used in Speech or Only in Writing?

It is used in both and is very common in conversation, blogs and essays. Speakers use it to explain how something came about, as in 하다 보니 늦었어요, "one thing led to another and I was late". The 까 is optional. Both 보니 and 보니까 work in polite, casual and formal speech.

What Is the Most Common Mistake with -다 보니(까)?

Learners use it for a single action with a single result, as in 한 번 먹다 보니 맛있어요. This pattern needs time passing or repeated action. For one try and one finding, use -아/어 보니(까), as in 먹어 보니까 맛있어요. Another slip is ending the sentence with a command.

What Is the Difference between -다 보니(까) and -다가?

-다가 shows a break, where one action is interrupted or replaced by another, as in 공부하다가 잠이 들었어요. -다 보니(까) shows a result that grows as you continue, as in 공부하다 보니 재미있어졌어요. With -다가, the first action stops. With -다 보니(까), the first action goes on, and the finding comes from it.

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