### Теория:

Study some information about positive 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 утвердительного предложения нужно использовать следующий порядок слов:
subject $$+$$ will $$+$$ have $$+$$ been $$+$$ Ving $$+$$ other parts of the sentence.
Examples

Mark will have driving a сar for two hours tomorrow.

Jane will have been working for three hours tomorrow.

 I will have been working you will have been working he, she, it will have been working we will have been working You will have been working They will have been working