Ответ:

  1. Отрицательное: His parents were not in Moscow yesterday.

    Вопросительное: Were his parents in Moscow yesterday?

  2. Отрицательное: This animal is not wild.

    Вопросительное: Is this animal wild?

  3. Отрицательное: Her brother will not be at work tomorrow.

    Вопросительное: Will her brother be at work tomorrow?