The futuro perfecto de subjuntivo, the future perfect subjunctive, is one of the three perfect tenses of the subjunctive mood. It works the same way as the future perfect indicative but it follows the rules for the subjunctive.
The futuro perfecto de subjuntivo is formed by the auxiliar verb "haber" in the future imperfect subjunctive tense followed by the past participle of the main verb. The English equivalent of the futuro perfecto de subjuntivo could be, depending on the situation, 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.
Quienes hubieren traspasado esa propiedad privada, serán perseguidos por la ley.
Those who trespass that private property will be prosecuted.
The futuro perfecto de subjuntivo is formed by the auxiliar verb "haber" in the future imperfect subjunctive tense followed by the past participle of the main verb. The English equivalent of the futuro perfecto de subjuntivo could be, depending on the situation, 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.
Quienes hubieren traspasado esa propiedad privada, serán perseguidos por la ley.
Those who trespass that private property will be prosecuted.