I was just about to : ~하려던 참이었어요.

(으)려던 참이다 : (으)려고 하다 + 던 + 참 + 이다. (으)려고 하다 means "to intend to do something" 던 is a past perfect tense particle 참 means "a short period of time during work hours" 이다 means "to be" (으)려던 참이다 is used at the end of a sentence to show that you were about to do something: 너한테 전화를 하려던 참이었어요. I was just about to call you. 지금 나가려던 참이었어요. I was about to leave now. – 박물관에 같이 갈까요? – Shall we go to the museum together? – 안 그래도, 가려던 참이었어요. 같이 갈래요. – Actually, I was just about to go. Let’s go together. – 지금 뭐 해요? – What are you doing now? – 얼굴을 세수하고 잠을 자려던 참이었어요. – I was about to wash my face and go to sleep. – 지금은 바빠요? – Are you busy right now? – 안 그래도, 밥을 먹으려던 참이었어요. 15분 후에 돌아오세요. – Actually, I was about to eat a meal. Come back in 15 minutes. 아르바이트하러 가려던 참이었어요. I was about to go to work in a part time job.