그들이

그들이

"They" or "them" (referring to a group of people).

In this sentence, '그들이' serves as the subject of the sentence, indicating the group of people who performed the action of arriving.

그들이 시간에 맞춰 도착했다.

They arrived on time.

Here, '그들이' denotes the people who prepared the gift, acting as the subject of the subordinate clause.

나는 그들이 준비한 선물을 받았다.

I received the gift they prepared.

'그들이' refers to the ones who were talking, functioning as the subject of the main action within the clause.

그들이 이야기하는 것을 들을 수 있었다.

I could hear them talking.