общий:
3. Had they passed their exam successfully?
4. Had Ann been sunbathing since early morning?
специальный:
3. How had they passed their exam?
4. How long had Ann
been sunbathing?
альтернативный:
3. Had they passed or failed their exam?
4. Had Ann been sunbathing or walking since early morning?
разделительный:
3. They had passed their exam successfully, hadn't they?
4. Ann had been sunbathing since early morning, hadn't she?
вопрос к подлежащему:
3. Who had passed they exam success fully.
4. Who had been sunbathing since early morning.