El tiempo "Future in Past" de la voz pasiva responde a la pregunta: "What was going to be done?" = ¿Qué se iba a hacer? o "What was going to be being done?" = ¿Qué se iba a estar haciendo?
Tenses - Continuous Tenses
A house was going to be built.
Se iba a construir una casa / Una casa iba a ser construida
The soldiers thought they were going to be ambushed that night.
Los soldados pensaban que ellos iban a ser emboscados esa noche.
It was believed that a ditch was going to be dug along the road.
Se creía que una zanja iba a ser cavada a lo largo del camino.
The store was not going to be closed before 8:00 p.m.
La tienda no iba a estar cerrada antes de las 8:00 p.m.
This incident was not going to be easily forgotten.
Este incidente no iba a ser fácilmente olvidado.
Was a new song going to be recorded?
¿Iba una nueva canción a ser grabada?
Were the parcels going to be sent yesterday?
¿Iban los paquetes a ser enviados ayer?
I thought that a test pilot was going to be told to fly the plane.
Pensé que se le iba a decir a un piloto de pruebas que volara el avión.
At first, the guests were going to be offered to choose their rooms.
Al principio se les iba a ofrecer a los huéspedes que elijan sus cuartos.
A house was going to be being built.
Se va iba a estar construyendo una casa / Una casa iba a estar siendo construida
I thought this wall was going to be being painted by someone else, not by me.
Pensé que este muro iba a estar siendo pintado por otra persona, no por mí.
They didn't get into the room because they thought that it was going to be being used by the managers of the company.
No entraron a la sala porque pensaron que iba a estar siendo usada por los gerentes de la firma.