Ingliz tili grammatikasi

Shall (will) + ega + have + been + Ving?
 
Shall I have been working? Will he have been working?
KELASI TUGALLANGAN DAVOM ZAMONNING ISHLATILISHI
Future Perfect Continuous kelasi zamondagi birorta ish-harakatidan 
oldin boshlanib, o‘sha ish-harakat boshlanganda ham davom etadigan ish-
harakatni ifodalaydi. Bu zamonda ham ish-harakatni davom etish vaqtini 
ko‘rsatuvchi vaqt ko‘rsatkichi bo‘lishi kerak:
I shall begin to work at ten o’clock 
in the morning. When you return 
home at fi ve o’clock, I shall have 
been working for seven hours. 
Men ertalab soat o‘nda ishlashni 
boshlayman. Siz soat beshda qay-
tib kelganingizda men yetti soat 
ishlayotgan bo‘laman.
By the 1
st
 of May, 1998, he will have 
been working at the factory for 
twenty years. 
1998-yil birinchi mayda u zavodda 
yigirma yil ishlayotgan bo‘ladi.
The Future Perfect Continuous in the Past Tense