The Third Conditional
When you want to talk about impossible past scenarios—like rewriting the ending to your favorite movie—you use the third conditional (periodo ipotetico dell'irrealtà nel passato).
To build these sentences, use this formula:
- Se
- Pluperfect Subjunctive (congiuntivo trapassato) for the condition
- Past Conditional (condizionale passato) for the result
| If the raft had been bigger, the hero wouldn't have died. | Se la zattera fosse stata più grande, l'eroe non sarebbe morto. |
| If the director had changed the conclusion, he wouldn't have won the prize. | Se il regista avesse cambiato la conclusione, non avrebbe vinto il premio. |
Sentence Order
The se clause often sits at the beginning of the sentence to set the scene. However, just like in English, you can flip the order and put the result first without changing the meaning.
When the se clause comes second, you usually drop the comma.
| The character would have survived if he had climbed on the raft. | Il personaggio sarebbe sopravvissuto se fosse salito sulla zattera. |
| I wouldn't have twisted the scene if I had been the director. | Non avrei stravolto la scena se fossi stato il regista. |
Auxiliary Verbs Refresher
Because the third conditional relies heavily on compound tenses, you must choose either avere or essere as your helper verb for both halves of the sentence.
Remember: when your verb requires essere (such as verbs of motion, state of being, or passive constructions), the past participle must agree with the subject in gender and number.
| If the viewers had discovered the secret, they wouldn't have been surprised. | Se gli spettatori avessero scoperto il segreto, non sarebbero stati sorpresi. |
| If it had had a turning point, the story wouldn't have been banal. | Se avesse avuto una svolta, la storia non sarebbe stata banale. |
| If the antagonist had won, the movie would have ended worse. | Se l'antagonista avesse vinto, il film sarebbe finito peggio. |