### Теория:

Study some information about negative sentences in Future Perfect Continuous.

Для образования Future Perfect Continuous необходимо использовать структуру will have been и основной глагол с окончанием -ing.
Subject $$+$$ will $$+$$ have $$+$$ been $$+$$ Ving $$+$$ other parts of the sentence.
Для построения отрицательного предложения нужно использовать следующий порядок слов:
subject $$+$$ will$$+$$ not (won't) $$+$$ have $$+$$ been $$+$$ Ving $$+$$ other parts of the sentence.
Examples

Jack will not (won't) have been learning Maths all day tomorrow.

 I will not (won't) have been working you will not (won't) have been working he, she, it will not (won't) have been working we will not (won't) have been working You will not (won't) have been working They will not (won't) have been working