nobody knew
Personne ne savait qu'elle pouvait si bien parler français.
No one knew she could speak French so well.
Mais personne ne savait ce qui lui était arrivé.
But no one knew what had happened to him.
— Suzhou River (2000)
Personne ne savait qui l'avait fait.
No one knew who had done it.
Personne ne savait vraiment ce qui allait se passer.
No one really knew what was going to happen.
Mais en fait, personne ne savait ce qu'il pensait.
But actually, no one knew what he was thinking.
— Un Soleil (2019)
Personne ne savait à quel point Tom aimait Mary.
No one knew how much Tom loved Mary.
Personne ne savait ce qui nous attendait.
No one knew what awaited us.
Personne ne savait ce qui s'était passé.
Nobody knew what had happened.