Разделительный - это такой вопрос, задаваемый в случае уверенности в положительном ответе.
1. Is Polly always polite?
Who is always polite?
Is always Polly polite or rude?
Polly is always polite, isn't she?
When is Polly polite?
What is Polly?
2. Does he enter her room on tiptoe?
How does he enter her room?
Who enters her room on tiptoe?
Does he enter her room on tiptoe?
Does he enter her room on tiptoe or making a noise?
He always enters her room on tiptoe, doesn't he?