as if nothing had happened
Él se veía como si no hubiera pasado nada.
He looked as if nothing had happened.
Ella habló como si no hubiera pasado nada.
She spoke as if nothing had happened.
En treinta y tantas semanas podremos hacer como si no hubiera pasado nada.
In thirty-odd weeks, we’ll be able to act as if nothing had happened.
— Juno (2007)
Podríamos fingir como si no hubiera pasado nada.
We could pretend as if nothing had happened.
Cuando salió del hospital, volvió a ver a Iván, como si no hubiera pasado nada.
When he left the hospital, he saw Iván again, as if nothing had happened.
— Mujeres al borde de un ataque de nervios (1988)