would have said it
Si yo quisiera, te lo hubiera dicho.
If I wanted to, I would have told you.
— El Auto De La Compadecida (2000)
I would never have said it.
Estoy seguro de que Tom me lo hubiera dicho si hubiese sabido.
I'm sure Tom would have told me if he'd known.
Hubiera sido mejor que fueras tú quien me lo hubiera dicho.
It would have been better if you had told me yourself.
— Solaris (1972)
Who would have thought it?
Desearía que Tom nunca me lo hubiera dicho.
I wish Tom had never told me.
Si él me lo hubiera dicho no lo habría hecho.
If he had told me, I wouldn't have done it.