Извини, я знаю только 6 типов различных вопросов.
1. Общий вопрос:
Have they already come back from their holidays?
2. Специальный вопрос:
What have they already done?
3. Вопрос- хвостик
They have already come back from their holidays, haven't they?
4. Альтернативный вопрос
Have they already come back from their holidays or from the work?
5. Ворос к подлежащему
Who have already come back from their holidays?
6. Отрицательный вопрос
Haven't they already come back from their holidays?