there was; there were
Ce qui me sembla être plusieurs jours plus tard, il y eut de la lumière dehors.
What seemed to me like several days later, it was light outside.
Puis, il y eut un de ses cousins, un certain Favell.
Then there was one of his cousins, a certain Favell.
— Rebecca (1940)
There were three survivors.
Il lui tira dessus et il y eut un grand bruit.
He shot at him, and there was a loud bang.
— Mysterious Object at Noon (2000)
Quelque part là-dedans, il y eut la quatrième erreur.
Somewhere in there, the fourth mistake occurred.
Il y eut un silence un peu embarrassé.
There was a slightly awkward silence.