I already knew

I already knew what he would say.

Je savais déjà ce qu’il allait dire.

That you're smart, I already knew that.

Que tu es intelligent, je le savais déjà.

— The Asthenic Syndrome (1989)

I already knew the number three partner would be a problem.

Je savais déjà que le partenaire numéro trois poserait problème.

I already knew this.

Je le savais déjà.

The day before yesterday you impressed everyone, but I already knew you.

Avant-hier, tu as impressionné tout le monde, mais je te connaissais déjà.

I already knew the answer.

Je connaissais déjà la réponse.

I already knew.

Je le savais déjà.

— When Marnie Was There (2014)

I already knew it.

Je le savais déjà.

I already knew that she had become engaged.

Je savais déjà qu’elle s’était fiancée.

I already knew the truth.

Je connaissais déjà la vérité.