What are common mistakes with 과거 시제?

Learners who know the present tense usually pick up past tense quickly — it follows the same vowel harmony. Main errors are contraction mistakes. 🇬🇧 English speakers: English past tense has many irregular forms (go→went, eat→ate). Korean past tense is much more regular — the same rules apply to almost all verbs. Just add ㅆ. 🇩🇪 German speakers: German Perfekt (habe gemacht, bin gegangen) is a two-word construction. Korean's single-suffix past tense is simpler. No auxiliary needed. 🇷🇺 Russian speakers: Russian past tense marks gender (он сделал / она сделала). Korean past tense has NO gender marking — 했어요 works for everyone.

과거 시제: rules, examples & exercises | Korean Grammar A1

과거 시제

A1 — 동사활용

Past tense formation: -았/었/했어요 using the same vowel harmony as present tense

Can form past tense sentences and talk about completed actions

Examples

어제 학교에 갔어요. — I went to school yesterday.
점심을 먹었어요. — I ate lunch.
영화를 봤어요. — I watched a movie.
주말에 뭐 했어요? — What did you do on the weekend?

동사활용A1

Past Tense

Past tense formation: -았/었/했어요 using vowel harmony

Learning Goal

Can form past tense sentences and talk about completed actions

Exam Skills:쓰기읽기

Look at these examples. Can you spot the grammar pattern?

어제 학교에 갔어요.

I went to school yesterday.

점심을 먹었어요.

I ate lunch.

영화를 봤어요.

I watched a movie.

주말에 뭐 했어요?

What did you do on the weekend?

Pay attention to the highlighted parts. What do they have in common?

과거 시제 — Past Tense

The past tense in Korean uses -았/었/했 + 어요. The vowel harmony rules are the same as present tense — just add ㅆ (ssang-siot) to the ending.

Formation:

Last vowel	Present	Past
ㅏ or ㅗ	-아요	-았어요
Other vowels	-어요	-었어요
하다	-해요	-했어요

Examples:

Dictionary	Present	Past
가다 (go)	가요	갔어요 (가+았→갔)
먹다 (eat)	먹어요	먹었어요
오다 (come)	와요	왔어요 (오+았→왔)
마시다 (drink)	마셔요	마셨어요
공부하다 (study)	공부해요	공부했어요
보다 (see)	봐요	봤어요 (보+았→봤)

Pattern: If you know the present tense form, the past is easy — just insert ㅆ before 어요:

가요 → 가 + ㅆ + 어요 = 갔어요
먹어요 → 먹 + 었 + 어요 = 먹었어요
해요 → 했어요

Negative past: 안 + past, or stem + 지 않았어요: 안 갔어요 / 가지 않았어요 (didn't go).

Apply this grammar in A1 course exercises

Practice Exercises

Learners who know the present tense usually pick up past tense quickly — it follows the same vowel harmony. Main errors are contraction mistakes. 🇬🇧 English speakers: English past tense has many irregular forms (go→went, eat→ate). Korean past tense is much more regular — the same rules apply to almost all verbs. Just add ㅆ.

Common Error Patterns

Applied wrong vowel harmony in past tense (았 vs 었)

Same rule as present: ㅏ/ㅗ → 았어요, others → 었어요, 하다 → 했어요

Failed to contract past tense correctly

Past contractions: 가+았→갔, 오+았→왔, 보+았→봤, 마시+었→마셨, 하+였→했

어제 학교에 갔어요.

I went to school yesterday.

가다 → past: 가 (stem, ㅏ) + 았어요 → 갔어요 (contracted). 어제 (yesterday) confirms past context.

점심을 먹었어요.

I ate lunch.

먹다 → past: 먹 (stem, ㅓ — not ㅏ/ㅗ) + 었어요 → 먹었어요. No contraction needed since stem ends in consonant.

영화를 봤어요.

I watched a movie.

보다 → past: 보 (stem, ㅗ) + 았어요 → 봤어요 (ㅗ+ㅏ→ㅘ, plus ㅆ). Same contraction as present 봐요, just with ㅆ.

주말에 뭐 했어요?

What did you do on the weekend?

하다 → past: 했어요. The most common past tense form — hundreds of 하다 verbs all become ~했어요.

Practice in course

Apply this grammar in A1 course exercises

A1 Course

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Frequently asked questions

When is 과거 시제 used?: The past tense in Korean uses -았/었/했 + 어요. The vowel harmony rules are the same as present tense — just add ㅆ (ssang-siot) to the ending.
How is 과거 시제 formed?: Pattern: If you know the present tense form, the past is easy — just insert ㅆ before 어요: Negative past: 안 + past, or stem + 지 않았어요: 안 갔어요 / 가지 않았어요 (didn't go).
What are common mistakes with 과거 시제?: Learners who know the present tense usually pick up past tense quickly — it follows the same vowel harmony. Main errors are contraction mistakes. 🇬🇧 English speakers: English past tense has many irregular forms (go→went, eat→ate). Korean past tense is much more regular — the same rules apply to almost all verbs. Just add ㅆ. 🇩🇪 German speakers: German Perfekt (habe gemacht, bin gegangen) is a two-word construction. Korean's single-suffix past tense is simpler. No auxiliary needed. 🇷🇺 Russian speakers: Russian past tense marks gender (он сделал / она сделала). Korean past tense has NO gender marking — 했어요 works for everyone.