shall back
Verbo regular: back - backed- backed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I shall back
you shall back
she shall back
we shall back
you shall back
they shall back 	I shall be backing
you shall be backing
she shall be backing
we shall be backing
you shall be backing
they shall be backing	I shall have backed
you shall have backed
she shall have backed
we shall have backed
you shall have backed
they shall have backed	I shall have been backing
you shall have been backing
she shall have been backing
we shall have been backing
you shall have been backing
they shall have been backing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I shall not back
you shall not back
she shall not back
we shall not back
you shall not back
they shall not back 	I shall not be backing
you shall not be backing
she shall not be backing
we shall not be backing
you shall not be backing
they shall not be backing	I shall not have backed
you shall not have backed
she shall not have backed
we shall not have backed
you shall not have backed
they shall not have backed	I shall not have been backing
you shall not have been backing
she shall not have been backing
we shall not have been backing
you shall not have been backing
they shall not have been backing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shall I back?
shall you back?
shall she back?
shall we back?
shall you back?
shall they back? 	shall I be backing?
shall you be backing?
shall she be backing?
shall we be backing?
shall you be backing?
shall they be backing? 	shall I have backed?
shall you have backed?
shall she have backed?
shall we have backed?
shall you have backed?
shall they have backed? 	shall I have been backing?
shall you have been backing?
shall she have been backing?
shall we have been backing?
shall you have been backing?
shall they have been backing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shall I not back?
shall you not back?
shall she not back?
shall we not back?
shall you not back?
shall they not back? 	shall I not be backing?
shall you not be backing?
shall she not be backing?
shall we not be backing?
shall you not be backing?
shall they not be backing? 	shall I not have backed?
shall you not have backed?
shall she not have backed?
shall we not have backed?
shall you not have backed?
shall they not have backed? 	shall I not have been backing?
shall you not have been backing?
shall she not have been backing?
shall we not have been backing?
shall you not have been backing?
shall they not have been backing?