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