The Present simple tense

S+will/shall+have+been+V ₁ing

S+will/shall+have+been+not+V1 ing

Will/shall+S+have+been+ V1ing?

Signal words: by…for/since, by 5 o’clock tomorrow, by November next year, when he comes…, for, since, the last couple of hours-bir-ikki soat ichida, all day long-kun bo’yi, when you arrive,+future perfect continuous.
bu zamonni biz kelasi zamonda bir ish harakat bo’lganiga qadar malum vaqt mobaynida davom etadigan ish harakatni ifodalash uchun ishlatamiz. Boshqacha aytganda kelasi zamonda biror ish qanchadan beri davom etishligini ifodalash uchun ishlatamiz. Bu zamon 2ta holatda ishlatiladi.
1.Sodda gaplarda.
2.Qo’shma gaplarda.
I shall have been working at this factory for 5 years at this time next week.
When he comes here tomorrow we shall have been translating the article since morning.
By the time they reach York, they will have been travelling for four hours.

The future perfect continuous in the past:
(kelasi o’tgan tugallangan davomli zamon)

S+would/should+have been+V1 ing

S+would/should+not+have+been+ V1 ing

Would/should+S+have + been+ V1 ing?

Biz bu zamonni o’tgan zamon nuqtai nazaridan kelasi zamondagi ma’lum bir vaqtdan oldin boshlanib, o’sha paytda ham davom etadigan ish harakatlarni ifodalash uchun ishlatamiz. Bu zamon bosh gapdagi fe’l o’tgan zamonda bo’lgan qo’shma gapni o’zlashtirma gapga aylantirganda ergash gapda future perfect continuous o’rnida ishlatiladi.

He said that by the first of May he would have been working at that plant for twenty years. (u birinchi mayda o’sha zavodda 20 yildan beri ishlayotgan bo’lishligini aytdi)