[
  {
    "sentence": "Para el lunes, yo _____ terminado. (haber)",
    "correct": "habré",
    "distractor": "habría",
    "explanation": "Future of haber, yo = habré.",
    "source_chapter": "42",
    "source_title": "Future Perfect Tense"
  },
  {
    "sentence": "Dentro de un año, tú _____ dejado tu trabajo.",
    "correct": "habrás",
    "distractor": "habrías",
    "explanation": "Tú future of haber = habrás.",
    "source_chapter": "42",
    "source_title": "Future Perfect Tense"
  },
  {
    "sentence": "Para esa fecha, John _____ recibido muchas ofertas.",
    "correct": "habrá",
    "distractor": "habría",
    "explanation": "Él future of haber = habrá.",
    "source_chapter": "42",
    "source_title": "Future Perfect Tense"
  },
  {
    "sentence": "Nosotros _____ llegado para mañana.",
    "correct": "habremos",
    "distractor": "habríamos",
    "explanation": "Nosotros future of haber = habremos (no accent).",
    "source_chapter": "42",
    "source_title": "Future Perfect Tense"
  },
  {
    "sentence": "Ellos _____ comido dentro de dos horas.",
    "correct": "habrán",
    "distractor": "han",
    "explanation": "Future perfect needs habrán, not present.",
    "source_chapter": "42",
    "source_title": "Future Perfect Tense"
  },
  {
    "sentence": "Para diciembre, ella habrá _____ . (volver)",
    "correct": "vuelto",
    "distractor": "volvido",
    "explanation": "Volver has irregular participle 'vuelto'.",
    "source_chapter": "42",
    "source_title": "Future Perfect Tense"
  },
  {
    "sentence": "By summer, I will have learned = Para el verano, yo _____ aprendido.",
    "correct": "habré",
    "distractor": "he",
    "explanation": "Future perfect uses habré, not he (present perfect).",
    "source_chapter": "42",
    "source_title": "Future Perfect Tense"
  }
]