Bonjour,
Réponse :
91.
1. The carpet is changed every five years ( by them )
2. All the thank-you letters have been sent ( by her )
3. The prison gates were opened ( by him ) at 9 a.m.
4. The new lighting system is being installed ( by them )
5. The Dome hadn’t been built ( by them )
6. The town hall was being painted ( by them ) at the time.
7. The neighbours won’t be informed ( by us )
92.
1. I was offered a holiday in Morocco.
2. They are being looked after ( by someone )
3. He will be given another chance next week. ( by them )
4. I was told to go away ( by someone )
5. The opening day was soon agreed ( by them )
93.
1. Pizzas have already been ordered.
2. I will be driven to the airport.
3. I was asked to talk to them.
4. You are being watched.
5. We were shown where it was.
Explications :
PASSIF :
BE ( conjugué au temps de la voix active ) + participe passé
D'où l'importance de savoir conjuguer BE à tous les temps
Le complément d'agent introduit par "by", est souvent sous entendu : il n'est pas indispensable de le mettre