1. Общий: Was Mary watching a film with her parents from 5 till 6 o’ clock yesterday?
Специальный: When was Mary watching a film with her parents?
2. Общий: Were they watching TV when mother came?
Специальный: What were they doing when mother came?
3. Общий: Was he reading a book at 5 o’ clock yesterday?
Специальный: What was he doing at 5 o’ clock yesterday?