Respuesta:
1. I haden't saved my document , before the computer crashed / Had you sabed your document , before the computer crashed?
2. John haden't gone out , when I arrived in the office. / Had John gone out , when I arrived in the office?
3. The train haden't just left when I arrived at the station./ Had the train just left when I arrived at the station?
4. She haden't just left the room when the police arrived. / Had she left the room yet when the police arrived?
5. I haden't just put the whashing out when it started to rain. / Had you put the washing out yet when it started to rain?