when I looked at my watch I realized that I missed a bus.

when I looked at my watch I realized that it was too late for dinner

when I looked at my watch I realized that I was late for consultation.

when I looked at my watch I realized that I forgot about lesson.

Tom was upset because his girlfriend forgot about his birthday.

Tom was upset because he missed an important meeting.

Tom was upset because his friend went to other place.

Tom was upset because his mom came home too late.