Salut vous pouvez m'aider svp merci d'avance

Bonjour
have au prétérit (had) + participe passé
il situe une action passée antérieure à celle énoncée au simple past (ou prétérit)
1- I spent the weekend at my grandparents' after I had finished my work.
2- The athletes had changed their shoes before they participated the race.
3- The computer user configured the software that he had downloaded from the Internet.
4- At 1: 26 pm, the firefighters eventually put out the fire which had started early in the morning.
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bonne journée ☺☺☺