1.Загальне питання - is christmas probably the most festive time of the year?
2.Спец.питання - Why is christmas probably the most festive time of the year?
3.Розділове питання - christmas is probably the most festive time of the year, is not it?
4.Вибіркове питання - is christmas probably the most festive time of the year or not?
5.Питання до підмета - What is probably the most festive time of the year? (What написал потому что это не живой обьект.)