아르바이트를

아르바이트를

Part-time job.

The word '아르바이트를' refers to 'part-time job,' used here as the object of the verb '하기로 했어요' which means 'decided to do.'

저는 방학 동안 아르바이트를 하기로 했어요.

I decided to do a part-time job during the vacation.

The word '아르바이트를' again denotes 'part-time job,' employed as the object of the verb '시작했어요,' meaning 'started.'

그는 학교 근처에서 아르바이트를 시작했어요.

He started a part-time job near the school.

Here, '아르바이트를' signifies 'part-time job,' highlighting it as the task students might undertake, tying it to the verb '해야 할,' which is 'have to do.'

학생들은 오후에 아르바이트를 해야 할 때가 있어요.

Students sometimes have to work part-time in the afternoon.