Future Perfect Continuous kelasi zamondagi birorta ish-harakatidan oldin boshlanib, o‘sha ish-harakat boshlanganda ham davom etayotgan ish-harakatni ifodalaydi. Bu zamonda ham ish-harakatni davom etish vaqtini ko‘rsatuvchi vaqt ko‘rsatkichi bo‘lishi kerak:
Future Perfect Continuous in the Past Tense bosh gapidagi fe’l o‘tgan zamonda bo‘lgan qo‘shma gapning ergash gapida 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 ishlayotganiga yigirma yil bo‘lishini aytdi.