1) He saw this film yesterday
общий Did he see this film yesterday?
альтернативный Did he see this film yesterday or 5 days ago?
специальный When did he see this film?
разделительный He saw this film yesterday, didn*t he?
вопрос к подлежащему Who saw this film yesterday?.
2) I will go to school tomorrow
общий Will I go to school tomorrow?
альтернативный Will I go to school or to the cinema tomorrow?
специальный Where will I go tomorrow?
разделительный I will go to school tomorrow, won*t I?
вопрос к подлежащему Who will go to school tomorrow?.
3) We are reading an interesting book now
общий Are we reading an interesting book now?
альтернативный Are we reading an interesting book or a magazine now?
специальный What are we reading now?
разделительный We are reading an interesting book now, aren*t we?
вопрос к подлежащему Who is reading an interesting book now?