tu l'aurais

you would have

→ tu
phrase Rare #45,314
you would have This is the informal singular form of the conditional perfect: tu would have + l’, an unstressed object pronoun meaning “it” or “him/her,” depending on context. The phrase is usually followed by a past participle, such as tu l’aurais su (“you would have known”) or tu l’aurais fait (“you would have done it”).
FR: Tu l'aurais compris si tu avais écouté.
EN: You would have understood it if you had listened.

Tu l'aurais peut-être su dès qu'elle a parlé d'assurance accident, mais moi non.

You might have known as soon as she mentioned accident insurance, but I didn't.

— Assurance sur la mort (1944)

Je m'en doute, sinon tu l'aurais déjà fait.

I figured as much; otherwise, you would have done it already.

— Tout sur ma mère (1999)

Tu l'aurais fait pour moi.

You would have done it for me.

Il m'a dit de ne pas te le dire, mais tu l'aurais su.

He told me not to tell you, but you would have found out.

— Article 15 (2019)