What the pluperfect is — the 'had done' tense
The pluperfect describes a past action that happened before another past action.
The pluperfect — in French le plus-que-parfait (literally "the more-than-perfect") — is the tense you use for an action that was already complete before another moment in the past. In English it is the "had done" tense:
- J'avais mangé avant le film. — I had eaten before the film.
- Elle était partie quand je suis arrivé. — She had left when I arrived.
- Nous avions fini nos devoirs. — We had finished our homework.
The key idea is two past actions in sequence. One of them happened first (that one goes in the pluperfect), and the other happened later (usually in the perfect or imperfect):
Quand je suis arrivé à la gare (later — perfect), le train était déjà parti (earlier — pluperfect). When I arrived at the station, the train had already left.
Think of it as the "past behind the past". If the perfect tense (j'ai mangé — I ate / I have eaten) is one step into the past, the pluperfect is two steps back — it sets the scene that was already true before your story's main events.
Worked mini-example. Decide which verb is pluperfect in: "When I phoned, she had already gone to bed." The phoning happens at the story's moment (perfect: j'ai téléphoné); the going to bed happened earlier, so it is pluperfect: elle était déjà couchée. Full sentence: Quand j'ai téléphoné, elle s'était déjà couchée.
- Pluperfect = English 'had done' (had eaten, had left, had finished).
- It marks the earlier of two past actions — the 'past behind the past'.
- Often pairs with the perfect: Quand je suis arrivé, le train était parti (when I arrived, the train had left).
- If the perfect is one step into the past, the pluperfect is two steps back.