I was ...ing
I was cleaning.
J'étais en train de réfléchir.
I was thinking.
Lorsque Tom reçut mon coup de fil, j'étais en train de sortir de chez moi.
When Tom received my call, I was leaving my house.
J'étais en train de lui parler.
I was talking to him.
J'étais en train de travailler quand c'est arrivé.
I was working when it happened.
J'étais en train de le caresser quand il m'a mordu.
I was petting him when he bit me.
Je pensais que j'étais en train de devenir folle.
I thought I was going crazy.
J'étais en train de t'appeler.
I was just calling you.
J'étais en train de cueillir des fraises dans le jardin.
I was picking strawberries in the garden.
J'étais en train de le chercher.
I was looking for it.