1) Отрицательное предложение She was not playing computer games at 5 o'clock yesterday.
2) Альтернативный вопрос Was she playing computer games at 5 o'clock or at 6 yesterday?
3) Специальный вопрос What was she doing at 5 o'clock yesterday?
4) Вопрос к подлежащему Who was playing computer games at 5 o'clock yesterday?
5) Отрицательный вопрос Wasn't she playing computer games at 5 o'clock yesterday?
6) Разделительный вопрос
She was playing computer games at 5 o'clock yesterday, wasn't she?