This is the 3041st most frequent Korean word.
행사를
"행사를" is the accusative form of "행사," meaning "event" or "ceremony."
In this sentence, '행사를' is used as the object of the verb '계획하고 있어요' (are planning), referring to the 'event' being planned.
그들은 주말에 큰 행사를 계획하고 있어요.
They are planning a big event for the weekend.
Here, '행사를' serves as the object of the verb '마치기' (complete), indicating the 'event' that was completed.
행사를 성공적으로 마치기 위해 모두가 협력했어요.
Everyone cooperated to successfully complete the event.
In this context, '행사를' is the object of the verb '준비하기' (prepare for), representing the 'event' being prepared.