was dreaming
Et t'as des cigarettes, j'en rêvais.
And you've got cigarettes—I’ve been dreaming of them.
— Apocalypse Now (1979)
Je me suis pincé pour m'assurer que je ne rêvais pas.
I pinched myself to make sure I wasn't dreaming.
J'en rêvais même la nuit.
I even dreamed about it at night.
— Amarcord (1973)
À quoi rêvais-tu quand je t'ai réveillée ?
What were you dreaming about when I woke you up?
J'en rêvais.
I dreamed about it.
De quoi rêvais-tu ?
What were you dreaming about?