발견하다([bal-gyeon-ha-da/discover]) means to find something you didn't know before, to discover, to spot. In polite speech, say 발견해요([bal-gyeon-hae-yo]) or 발견합니다.
발견했어요([bal-gyeon-hae-sseo-yo/discovered]) is the polite past form. Example: 창고에서 불량품을 발견했어요 (I discovered defective products in the warehouse).
찾다([chat-da]) is to look for / find something lost. 발견하다([bal-gyeon-ha-da]) is to discover something new or unexpected, like a problem, a place, or a fact - more EPS-TOPIK factory/inspection style.
발견하다([bal-gyeon-ha-da/discover]) means "to discover". To find something new, unexpected, or hidden - to spot, to detect.
1. Factory: “불량품을 발견해요 (bul-lyang-pu-meul bal-gyeon-hae-yo)” I discover defective products.
2. Past: 발견했어요([bal-gyeon-hae-sseo-yo/discovered]) - 균열을 발견했어요 (found a crack).
3. Wish: 발견하고 싶어요([bal-gyeon-ha-go si-peo-yo/want to discover]) - 새로운 맛집 발견하고 싶어요.
4. Must: 출하 전에 발견해야 해요 (Must discover before shipment) - very EPS-TOPIK inspection.
A: What do you discover in the warehouse?
B: 불량품을 발견해요. B: bul-lyang-pu-meul bal-gyeon-hae-yo.B: I discover defective products.
A: 언제 발견해요? A: eon-je bal-gyeon-hae-yo?A: When do you discover it?
B: 검수할 때 발견해요. B: geom-su-hal ttae bal-gyeon-hae-yo.B: I discover it during inspection. - 발견하다([bal-gyeon-ha-da/discover])
A: What did you discover yesterday?
B: 균열을 발견했어요. B: gyun-yeo-reul bal-gyeon-hae-sseo-yo.B: I discovered a crack.
A: 어디서 발견했어요? A: eo-di-seo bal-gyeon-hae-sseo-yo?A: Where did you discover it?
B: 생산 라인에서 발견했어요. B: saeng-san la-in-e-seo bal-gyeon-hae-sseo-yo.B: I discovered it on the production line. - 발견했어요([bal-gyeon-hae-sseo-yo/discovered])
A: What do you have to do before shipment?
B: 불량품을 발견해야 해요. B: bul-lyang-pu-meul bal-gyeon-hae-ya hae-yo.B: I have to discover defective products.
A: 언제까지요? A: eon-je-kka-ji-yo?A: By when?
B: 오늘까지 발견해야 해요. B: o-neul-kka-ji bal-gyeon-hae-ya hae-yo.B: I have to discover by today. - 발견해야 해요([bal-gyeon-hae-ya hae-yo/have to discover])
• 발견하다([bal-gyeon-ha-da/discover]) discover / spot / detect
- 발견했어요([bal-gyeon-hae-sseo-yo/discovered]) discovered
- 발견하고 싶어요([bal-gyeon-ha-go si-peo-yo/want to discover]) want to discover
- 발견해야 해요([bal-gyeon-hae-ya hae-yo/have to discover]) have to discover
- 발견하지 마세요([bal-gyeon-ha-ji ma-se-yo/don't discover]) don't discover / keep hidden