공동 연구했다

VerbPastFormal

gongdong yeonguhaetda

collaborate

collaborer ; coopérer ; travailler ensemble

Conjugation

Casual반말 — between close friends

Polite해요체 — standard politeness

Formal합쇼체 — very formal

	Casual	Polite	Formal
Present	공동 연구해요 gongdong yeonguhaeyo I conduct joint research	—	공동 연구합니다 gongdong yeonguhamnida I conduct joint research
Past	공동 연구했어요 gongdong yeonguhaesseoyo I conducted joint research	—	공동 연구했다 gongdong yeonguhaetda I conducted joint research
Future	공동 연구할 거예요 gongdong yeonguhal geoyeyo I will conduct joint research	—	공동 연구할 것이다 gongdong yeonguhal geosida I will conduct joint research

Casual

Polite

Formal

Present

gongdong yeonguhaeyo

I conduct joint research

—

gongdong yeonguhamnida

I conduct joint research

Past