세다([se-da/count]) means to count numbers, quantity. In polite speech, say 세요([se-yo]) or 셉니다([sem-ni-da]).
셌어요([se-sseo-yo/counted]) is the polite past form. Example: 제품 100개 셌어요 (Counted 100 products).
Yes, 세다 has two meanings: 1) to count 2) to be strong. Context makes it clear. EPS-TOPIK uses it for counting products, people, boxes.
세다([se-da/count]) means "to count". To check quantity by counting one by one.
1. Warehouse: “박스를 하나씩 세요 (bak-seu-reul ha-na-ssik se-yo)” I count boxes one by one.
2. Past: 셌어요([se-sseo-yo/counted]) - 100개 셌어요, 두 번 셌어요.
3. Wish: 세고 싶어요([se-go si-peo-yo/want to count]) - 인원수 세고 싶어요 (want to count people).
4. Must: 오늘 퇴근 전까지 세야 해요([se-ya hae-yo/have to count]) - EPS-TOPIK inventory task.
A: How do you count boxes?
B: 하나씩 세요. B: ha-na-ssik se-yo.B: I count one by one.
A: 혼자 세요? A: hon-ja se-yo?A: Do you count alone?
B: 네, 매일 아침 세요. B: ne, mae-il a-chim se-yo.B: Yes, I count every morning. - 세다([se-da/count])
A: Did you count stock yesterday?
B: 네, 100개 셌어요. B: ne, baek-gae se-sseo-yo.B: Yes, counted 100 pieces.
A: 정확하게 셌어요? A: jeong-hwa-ka-ge se-sseo-yo?A: Did you count accurately?
B: 네, 두 번 셌어요. B: ne, du beon se-sseo-yo.B: Yes, I counted twice. - 셌어요([se-sseo-yo/counted])
A: By when do you have to count?
B: 오늘 퇴근 전까지 세야 해요. B: o-neul toe-geun jeon-kka-ji se-ya hae-yo.B: I have to count before leaving today.
A: 몇 개 세야 해요? A: myeot-gae se-ya hae-yo?A: How many do you have to count?
B: 200개 세야 해요. B: i-baek-gae se-ya hae-yo.B: I have to count 200 pieces. - 세야 해요([se-ya hae-yo/have to count])
• 세다([se-da/count]) count
- 셌어요([se-sseo-yo/counted]) counted
- 세고 싶어요([se-go si-peo-yo/want to count]) want to count
- 세야 해요([se-ya hae-yo/have to count]) have to count
- 세지 마세요([se-ji ma-se-yo/don't count]) don't count