I was busy
J'étais occupé avec ma collection de timbres.
I was busy with my stamp collection.
— Assurance sur la mort (1944)
Désolé de ne pas avoir répondu plus tôt à votre message, j'étais occupé.
Sorry for not replying to your message sooner; I was busy.
J'étais occupé par quelque chose d'important.
I was busy with something important.
J'étais occupé ces deux derniers jours.
I was busy these past two days.
Sorry, I was busy.
I was busy cooking.
I was busy this week.