자꾸

자꾸

Repeatedly; constantly; persistently.

In this sentence, '자꾸' emphasizes the repetitive nature of the actions being apologized for.

자꾸 질문해서 죄송합니다.

I'm sorry for asking repeatedly.

Here, '자꾸' signifies the continuous occurrence of smiling, adding a cheerful tone to the statement.

그가 자꾸 웃어서 기분이 좋아졌어요.

I felt better because he kept smiling.

In this usage, '자꾸' expresses persistent and involuntary recurrence of thoughts.

난 그일에 대해 자꾸 생각하게 돼요.

I find myself thinking about that matter persistently.