Phrase · 💭 Hypotheses in every register

De haberlo sabido, no habría venido.

Had I known, I wouldn't have come.

C2regret and counterfactualssoutenuAudio · bientôt disponible

Pourquoi chaque mot est à sa place

De1prépositionif (lit. of)haberlo2verbehaving … ithaber · infinitifsabidoverbeknownsaber · participe · masc. · sing.,noadverbenothabría3verbeI would havehaber · conditionnel · 1re pers. sing.venido3verbecomevenir · participe · masc. · sing..

De → haberlo: de + infinitive: condition
haberlo → sabido: haber + participle
habría → venido: habría + participle: unreal past

Mot à mot : “Of having known it, I wouldn't have come.”

Pourquoi elle est construite ainsi

Les notes correspondent aux numéros ci-dessus.

1
de + compound infinitive = a past condition: de haberlo sabido = had I known (= si lo hubiera sabido). Formal. The extended conditional system: de + infinitive, hubiera and colloquial patterns →
2
The pronoun lo attaches to the infinitive: haberlo sabido. It refers to the fact you learnt.
3
Conditional perfect: the unreal result in the past. No hubiera venido is also correct. Past unreal conditions: pluperfect subjunctive and conditional perfect →

Variantes

Si lo hubiera sabido, no habría venido.
Si lo hubiera sabido, no hubiera venido.
De saberlo, no habría venido.