1. Bu zamon kelasi zamondagi aniq bir paytda ancha vaqtdan buyon davom etayotgan ish-harakatni ifodalaydi: I shall have been reading a book since morning at this time tomorrow. Men ertaga shu payti ertalabdan buyon kitob o’qiyotgan bo’laman. We shall have been working for an hour when you come. Siz kelganingizda biz bir soatdan buyon ishlayotgan bo’lamiz.
2. Ushbu zamon shaklidagi so’roq gaplarning oldidan “How long” (qancha vaqtdan buyon) birikmasi ishlatiladi. How long? Birikmasi ish-harakatning qancha vaqtdan buyon sodir bo’lishini so’rash uchun ishlatiladi: How long will Dilshod have been studying at the lyceum at this time next year? Dilshod kelasi yil shu paytda qancha vaqtdan buyon litseyda o’qiyotgan bo’ladi?
