has not been
This has not been fun.
El costo no ha sido ningún problema.
The cost hasn't been a problem at all.
It hasn't been my fault.
No ha sido sencillo mantener la casa.
Maintaining the house has not been easy.
— Fearless - Sin miedo (2006)
Tom no ha sido profesor por mucho tiempo.
Tom hasn't been a teacher for very long.
No hay de qué, no ha sido tan peligroso.
You're welcome, it wasn't that dangerous.
— La vida de los otros (2006)