was becoming, became
Elle devenait, chaque jour, de plus en plus belle.
She was becoming more and more beautiful every day.
La fête devenait incontrôlable.
The party was getting out of control.
Je ne serais pas très surpris si cette chanson devenait un tube.
I wouldn’t be very surprised if this song became a hit.
Chez nous, pour ne pas mourir de pauvreté, on devenait prêtre ou bandit.
In our country, to avoid dying of poverty, one became a priest or a bandit.
— Le Bon, la Brute et le Truand (1966)
Au bout d'un moment, ça devenait normal.
After a while, it started to feel normal.
— Les Affranchis (1990)