has not been able to
No ha podido llevar a cabo el ataque.
He was unable to carry out the attack.
— El hundimiento (2004)
Tom no ha podido ir a la escuela por tres semanas.
Tom hasn't been able to go to school for three weeks.
Pero desde entonces no ha podido seguir mi ritmo.
But since then he hasn't been able to keep up with me.
— American Gangster (2007)
No ha podido venir porque se halla enfermo.
He hasn't been able to come because he is ill.
Desde que se hirió en un accidente, no ha podido volver a andar.
Since being injured in an accident, he has not been able to walk again.