hubiera ocurrido

Si ese accidente hubiera ocurrido en una ciudad, habría causado un desastre.

If that accident had happened in a city, it would have caused a disaster.

Si hubiera tenido cuidado, entonces el terrible accidente no hubiera ocurrido.

If he had been careful, then the terrible accident would not have happened.

Jamás se me hubiera ocurrido.

It would never have occurred to me.

No lo va a recordar, como si nunca hubiera ocurrido.

He won't remember it, as if it never happened.

— El maquinista (2004)

Jugaban con las almohadas como si nada hubiera ocurrido.

They played with the pillows as if nothing had happened.

Tom hizo como si no hubiera ocurrido nada.

Tom acted as if nothing had happened.

No puedo imaginar qué hubiera ocurrido si no llego estar ahí ¿Cómo está ahora?

I can’t imagine what would have happened if I hadn’t been there. How is he/she doing now?

— Do You Thing (2001)

Ahora se comporta como si nada hubiera ocurrido.

Now he behaves as if nothing had happened.

Tom negó que hubiera ocurrido.

Tom denied that it had happened.