I would have told you
Je vous l'aurais dit avant, mais je ne pensais pas que vous comprendriez.
I would have told you sooner, but I didn't think you'd understand.
Si vous m'aviez demandé, je vous l'aurais dit.
If you had asked me, I would have told you.
Si je l'avais su, je vous l'aurais dit.
If I had known, I would have told you.
I would have told you.
L'aurais-je su, je vous l'aurais dit.
Had I known, I would have told you.