I was late for school this morning.
- J'étais en retard à l'école ce matin.
I was late again this morning, which made my boss angry.
- J'étais à nouveau en retard ce matin, ce qui a mis mon patron en colère.
The bus is behind time.
- Le bus est en retard.
The bus arrived ten minutes behind time.
- Le bus est arrivé dix minutes en retard.