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