I was taking the dog out for a walk later.
Who was taking the dog out for s walk later? Вопрос к подлежащему
Were you taking the dog out for a walk later? Общий
I was taking the dog out for a walk later,wasn't I? Разделительный
Whom were you taking out for a walk later? Специальный
Were you taking the dog or the cat out for a walk later? Альтернативный