A/V-(으)ㄹ걸요 grammar = probably, I think ~express assumption based on backup knowledge

A/V-(으)ㄹ걸요 grammar = probably, I think ~express assumption based on backup knowledge

Usage:
- Express an unsure assumption or supposition (based on the speaker’s backup knowledge) = probably, I think, I bet
- Use among close friends and spoken form only (not in written form)

Tense:

Adjective/ Verb + -(으)ㄹ걸요 (Present tense)

덥다 --> 더울걸요.

재미있다 --> 재미있을걸요.

가다 --> 갈걸요

있다 --> 있을걸요

돌아가다 --> 돌아갈걸요

공부하다 --> 공부할걸요 

Adjective/ Verb + 았/었을걸요 (Past tense)

보다 --> 봤을걸요

먹다 --> 먹었을걸요

도착하다 --> 도착햇을걸요

출발하다 --> 출발했을걸요

Noun + 일걸요 (Present tense) / + 였을걸요 (Past tense) 

학생 --> 학생일걸요 / 학생였을걸요

가수 --> 가수일걸요 / 가수였을걸요

Specific usage:

1. Can be used to softly disagree:

오후 6시에 출발할까요?
- 퇴근시간이라서 길이 많이 막힐걸요.

Shall we leave at 6 pm?
- It is rush hour, so the traffic will probably be jammed.

나미 씨랑 극장에 ‘국제시장’을 보러 가기로 해요.
- 나미 씨가 벌써 가 봤을걸요. 이 영화가 너무 유명하거든요.

I am planning to go to watch the movie “the international market” with Nami.
- I think she has already watched the movie. Because this movie is very famous.

2. Can’t be used when speaker and listener share the same information.

표가 주말까지 벌써 매진되었어요.
- 그러게요. 영화가 재미있나 봐요. (not 재미있을걸요.)

Ticket are already sold out by the weekend.
- Yeah. The movie seems interesting.

이 영화가 재미있을까요?
- 요즘 흥행 1위라고 하니까 재미있을걸요.

Do you think this movie is interesting?
- It’s ranked number 1 in the box office these days, so it is probably interesting.

3. Intonation of sentences with this expression rises slightly at the end.

부산시는 날씨가 어떤지 아세요?
- 남쪽이라서 서울보다 더 더울걸요.

Do you know what the weather is like in Busan?
- Because it is in the south, it must be hotter than Seoul.

4. In terms of strength of conviction, -(으)ㄹ걸요 expresses a weaker belief than -(으)ㄹ 거예요.

나미 씨가 점심을 먹었을까요?
- 먹었을걸요. 지금 3시잖아요.
- 먹었을 거예요. 아까 식당에 밥 먹으러 간다고 하더라고요.

Do you think Nami has had lunch?
- I think she ate. It is 3pm now.
- I am sure she has. She told me she went to the cafeteria to eat a while ago.

Examples:

1. 혹시 토니 씨 보셨어요?
- 아마 커피숍에 있을걸요. 아까 커피숍에 간다고 했거든요.

Did you see Tony?
- He is probably at the coffee shop. I heard from him that he went there earlier.

2. 어제 안나 씨가 수영장에 갔을까요?
- 아마 안 갔을걸요. 예전에 수영을 못 한다고 했던 것 같아요.

Do you think Anna went to swimming pool yesterday?
- Perhaps she didn't go. I think she said that she couldn't swim before.

3. 집 앞에 있는 마트가 몇 시에 여는지 아세요?
- 아마 10시쯤 열걸요. 다른 마트들이 대부분 10시에 열거든요.

Do you know when the mart in front of the house opens?
- I think it opens around 10 because of most of the others open at 10.

4. 혹시 나미 씨가 출발했을까요?
- 벌써 출발했을걸요. 나미 씨 집이 멀잖아요.

Do you think Nami has already left?
- I bet she has already left. Her house is far away.

5. 밍 씨가 지금 집에 있을걸요?
- 이 시간에는 보통 운동을 하니까 집에 없을걸요.

Do you think Minh is at home now?
- He usually works out at this time, so I bet he is not at home.

6. 미래아파트는 어때요?
- 주위에 술집 많아서 저녁에는 시끄러울걸요.

How about the Future apartment?
- There are many bars around, so it will probably be noisy at night

7. 그 책은 외국 학생이 읽기에 좀 어려울걸요. 한자가 많으니까요.
I bet that book may be difficult for foreign student to read. Because it has many Chinese characters.

8. 소포가 고향에 도착했을까요?
- 고향까지 일주일 정도 걸리니까 벌써 도착했을걸요.

Do you think that the package has arrived my hometown?
- Because it takes around a week, I bet it has already arrived.

9. 안나 씨가 지금 학교 있을까요?
- 아마 없을걸요. 이 시간에는 학생들이 돌아갔거든요.

Do you think Anna is at school now?
- Maybe not. At this time, students have gone home.

10. 나미 씨 가방가 동대문에 샀으니까 비싸지 않을거요.

Nami bag was bought in Dongdaemun, so it is probably not expensive.