Were the boys talking about football?(общий вопрос)
Who was talking about football?(вопрос к подлежащему)
What the boys were doing?(спец. вопрос)
What were the boys talking about? (спец. вопрос)
Were the boys talking about football?(общий вопрос)
Who was talking about football?(вопрос к подлежащему)
What the boys were doing?(спец. вопрос)
What were the boys talking about? (спец. вопрос)