사실 발표 준비는 다 했는데 그날 피피티도 준비해야 한다는 것을 몰라서 발표 준비를 못 했다고 말씀드렸습니다.
Actually, I finished preparation for the presentation, but didn't know I had to prepare PPT during the day, so I told you that I didn't prepare the presentation.