The pretérito pluscuamperfecto de subjuntivo, the past perfect subjunctive, is one of the three perfect tenses of the subjunctive mood. It works the same way as the past perfect indicative but it follows the rules for the subjunctive.
The pretérito pluscuamperfecto de subjuntivo is formed by the auxiliar verb "haber" in the past subjunctive tense followed by the past participle of the main verb. The English equivalent of the pretérito pluscuamperfecto de subjuntivo could be, depending on the situation, the past perfect "had + past participle of the main verb ", the conditional perfect "would or could + have + past participle of the main verb” or, simply, a past tense when the sentence has a subjunctive nuance.
The pretérito pluscuamperfecto de subjuntivo is formed by the auxiliar verb "haber" in the past subjunctive tense followed by the past participle of the main verb. The English equivalent of the pretérito pluscuamperfecto de subjuntivo could be, depending on the situation, the past perfect "had + past participle of the main verb ", the conditional perfect "would or could + have + past participle of the main verb” or, simply, a past tense when the sentence has a subjunctive nuance.