Bonjour,

Réponse :

1. When I arrived, the bell had already rung.

2. When I saw him play, I was amazed. I had never heard him play such beautiful sounds.

3. When she changed her mind, it was too late. I had already sold the house.

4. Dinner was more expensive than expected.

Explications :

Prétérit : action passée ...

Past perfect ( = Plu perfect ) : had + participe passé. Pour des actions antérieures à des actions passées ( on dit que c'est du passé dans le passé )