would have done it
No sé si él lo habría hecho por mí.
I don't know if he would have done it for me.
I wouldn't have done it.
Si fuera tan fácil como dices, ya lo habría hecho.
If it were as easy as you say, I would have done it already.
I would have done it.
¿Crees que de haberlo sabido lo habría hecho?
Do you think I would have done it if I’d known?
— 암살 (2015)