didn't know
Je me suis comporté comme si je ne le connaissais pas.
I acted as if I didn’t know him.
Je ne le connaissais pas à l'époque.
I didn’t know him at the time.
You didn't know him.
Je ne la connaissais pas très bien.
I didn’t know her very well.
I didn't know him.
Si je ne te connaissais pas, je dirais que tu as peur.
If I didn't know you, I would say you're scared.
— Harry Potter à l'école des sorciers (2001)
Je croyais que tu m'avais dit que tu ne connaissais pas Tom.
I thought you told me you didn't know Tom.
I didn't know him.
I didn't know her.