{
  "chapter_id": "05",
  "slug": "the-verb-ser",
  "title": "The Verb Ser",
  "time_range_sec": [1134, 1399],
  "summary": "Ser is the irregular Spanish verb for 'to be' used for factual, identity-defining statements: name, nationality, occupation, physical traits, generalizations, event location/time, and time/date.",
  "suggested_grammar_note_id": "ser-vs-estar",
  "rules": [
    {
      "title": "When to use ser",
      "bullets": [
        "Name, nationality, place of origin (Yo soy Alex; Soy de España).",
        "Occupation (Él es profesor — no indefinite article).",
        "Physical traits considered factual (Tú eres bonito).",
        "Generalizations (Es importante trabajar).",
        "Where/when an event takes place (La fiesta es en el club; La fiesta es a las seis).",
        "Time and date (Es lunes; Son las dos de la tarde)."
      ]
    },
    {
      "title": "Telling time with ser",
      "bullets": [
        "Use es for 1 o'clock: Es la una.",
        "Use son for 2 o'clock and later: Son las dos / tres / cuatro.",
        "Always include la / las before the hour.",
        "Add de la mañana / tarde / noche to specify time of day."
      ]
    },
    {
      "title": "Mental model",
      "bullets": [
        "Ser = factual statements about identity.",
        "Schoolroom rule 'permanent = ser' works because permanent traits are factual.",
        "Compare with estar (Chapter 7) for conditions, location, and emotions."
      ]
    }
  ],
  "examples": [
    {"es": "Yo soy Alex.", "en": "I am Alex.", "tags": ["ser", "name"]},
    {"es": "Yo soy español.", "en": "I am Spanish.", "tags": ["ser", "nationality"]},
    {"es": "Yo soy de España.", "en": "I am from Spain.", "tags": ["ser", "origin"]},
    {"es": "Él es profesor.", "en": "He is a professor.", "tags": ["ser", "occupation"]},
    {"es": "Tú eres bonita.", "en": "You are beautiful.", "tags": ["ser", "trait"]},
    {"es": "Es importante trabajar.", "en": "It is important to work.", "tags": ["ser", "generalization"]},
    {"es": "La fiesta es en el club.", "en": "The party is in the club.", "tags": ["ser", "event-location"]},
    {"es": "La fiesta es a las seis.", "en": "The party is at six.", "tags": ["ser", "event-time"]},
    {"es": "Es viernes.", "en": "It is Friday.", "tags": ["ser", "date"]},
    {"es": "Es la una de la tarde.", "en": "It is one in the afternoon.", "tags": ["ser", "time"]},
    {"es": "Son las dos de la tarde.", "en": "It is two in the afternoon.", "tags": ["ser", "time"]}
  ],
  "vocab": [
    {"es": "ser", "en": "to be / to exist", "pos": "verb"},
    {"es": "fiesta", "en": "party", "pos": "noun"},
    {"es": "profesor", "en": "professor / teacher", "pos": "noun"},
    {"es": "bonito/a", "en": "beautiful / pretty", "pos": "adjective"},
    {"es": "importante", "en": "important", "pos": "adjective"}
  ],
  "conjugation_tables": [
    {
      "verb": "ser",
      "tense_id": "ind_presente",
      "forms": {"yo": "soy", "tu": "eres", "el": "es", "nosotros": "somos", "vosotros": "sois", "ellos": "son"}
    }
  ],
  "exercises": [
    {"sentence": "Yo _____ de México.", "correct": "soy", "distractor": "estoy", "explanation": "Place of origin uses ser."},
    {"sentence": "Ella _____ doctora.", "correct": "es", "distractor": "está", "explanation": "Occupation uses ser; no indefinite article needed."},
    {"sentence": "Nosotros _____ amigos.", "correct": "somos", "distractor": "estamos", "explanation": "Identity (we are friends) uses ser."},
    {"sentence": "_____ las tres de la tarde.", "correct": "Son", "distractor": "Es", "explanation": "Hours 2 and up are plural → son."},
    {"sentence": "_____ la una en punto.", "correct": "Es", "distractor": "Son", "explanation": "1 o'clock is singular → es la una."},
    {"sentence": "La fiesta _____ en mi casa.", "correct": "es", "distractor": "está", "explanation": "Where an event TAKES PLACE uses ser, not estar."},
    {"sentence": "Tú _____ muy alto.", "correct": "eres", "distractor": "estás", "explanation": "Physical trait → factual → ser."}
  ],
  "caveats": "Some on-screen OCR garbled the conjugation table (e.g., 'iNeres' for 'eres'); reconstructed from standard ser conjugation."
}
