je n'avais encore jamais vu

I had never seen before

→ je
phrase Rare #42,425
I had never seen before Used to say that something had never been seen by the speaker up to that point. The phrase often appears before a noun or in a clause introduced by « que »; « encore jamais » means “never before.”
FR: Je n'avais encore jamais vu un coucher de soleil aussi beau.
EN: I had never seen such a beautiful sunset before.

Je n'avais encore jamais vu une vapeur si dense.

I had never seen such dense steam before.

— Nausicaä de la vallée du vent (1984)

Voici un spectacle que je n'avais encore jamais vu.

This is a show I'd never seen before.

— Le Seigneur des anneaux : Le Retour du roi (2003)

Au contraire, ils firent quelque chose que je n'avais encore jamais vu.

On the contrary, they did something I had never seen before.

— Rang de Basanti (2006)

Je n'avais encore jamais vu autant d'oiseaux en même temps auparavant.

I had never seen so many birds at once before.