Present Perfect Progressive

What has been being done? - ¿Qué se ha estado haciendo?

A house has been being built.

Se ha estado construyendo una casa / Una casa ha estado siendo construida

• My mother has been being treated by the same doctors for years.

  • My madre ha estado siendo tratada por los mismos médicos durante años.

• Stricter and stricter measures have been being taken to reduce crime in the city.

  • She han estado tomando medidas cada vez más estrictas para reducir el delito en la ciudad.

http://www.shertonenglish.com/resources/es/passive-voice/present-perfect.php