1. Общий вопрос
Do her two children play in the back?
2. Разделительный вопрос
Her two children play in the back, don’t they?
3. Специальный вопрос
Where do her two children play?
4. Вопрос к подлежащему
Who plays in the back?
5. Альтернативный вопрос
Do her two children play in the back or in the front?