you had left
I thought you were gone.
Je croyais que tu étais parti.
I thought you left.
Mais tu étais parti du pays pendant tant d'années !
But you had been away from the country for so many years!
— No (2012)
Tu étais parti chercher une maison, non ?
You went to look for a house, didn't you?
— Arrietty, le petit monde des chapardeurs (2010)
Je suis descendue et tu étais parti.
I went downstairs and you were gone.
Quand je suis arrivée, tu étais parti.
When I arrived, you had already left.
— Cours, Lola, cours (1998)
Je pensais que tu étais parti.
I thought you were gone.