끝내다([kkeut-nae-da/finish]) is the verb for finishing something yourself. In polite speech, say 끝내요([kkeun-nae-yo]).
끝냈어요([kkeut-nae-sseo-yo/finished]) is the polite past form. Example: 숙제를 끝냈어요 (I finished my homework).
끝내야 해요([kkeut-nae-ya hae-yo/have to finish]) means you must finish. Example: 오늘 끝내야 해요 (I have to finish today).
끝내다([kkeut-nae-da/finish]) means "to finish". It is used when you complete something yourself.
1. Daily: “숙제를 끝내요 (suk-je-reul kkeun-nae-yo)”
2. Past: 끝냈어요([kkeut-nae-sseo-yo/finished]) finished.
3. Duty: 끝내야 해요([kkeut-nae-ya hae-yo/have to finish]) have to finish.
4. Warning: 끝내지 마세요([kkeut-nae-ji ma-se-yo/don't finish]) don't finish.
A: When do you finish?
B: 오늘 끝내요. B: o-neul kkeun-nae-yo.B: I finish today.
A: 뭘 끝내요? A: mwol kkeun-nae-yo?A: What do you finish?
B: 숙제를 끝내요. B: suk-je-reul kkeun-nae-yo.B: I finish my homework. - 끝내다([kkeut-nae-da/finish])
A: Did you finish yesterday?
B: 네, 끝냈어요. B: ne, kkeun-nae-sseo-yo.B: Yes, I finished.
A: 뭘 끝냈어요? A: mwol kkeun-nae-sseo-yo?A: What did you finish?
B: 숙제를 끝냈어요. B: suk-je-reul kkeun-nae-sseo-yo.B: I finished my homework. - 끝냈어요([kkeut-nae-sseo-yo/finished])
A: Do you have to finish today?
B: 네, 오늘 끝내야 해요. B: ne, o-neul kkeun-nae-ya hae-yo.B: Yes, I have to finish today.
A: 뭘 끝내야 해요? A: mwol kkeun-nae-ya hae-yo?A: What do you have to finish?
B: 보고서를 끝내야 해요. B: bo-go-seo-reul kkeun-nae-ya hae-yo.B: I have to finish the report. - 끝내야 해요([kkeut-nae-ya hae-yo/have to finish])
• 끝내다([kkeut-nae-da/finish]) finish
- 끝냈어요([kkeut-nae-sseo-yo/finished]) finished
- 끝내고 싶어요([kkeut-nae-go si-peo-yo/want to finish]) want to finish
- 끝내야 해요([kkeut-nae-ya hae-yo/have to finish]) have to finish
- 끝내지 마세요([kkeut-nae-ji ma-se-yo/don't finish]) don't finish