must quarterback
Verbo regular: quarterback - quarterbacked- quarterbacked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must quarterback
you must quarterback
he must quarterback
we must quarterback
you must quarterback
they must quarterback 	I must be quarterbacking
you must be quarterbacking
he must be quarterbacking
we must be quarterbacking
you must be quarterbacking
they must be quarterbacking	I must have quarterbacked
you must have quarterbacked
he must have quarterbacked
we must have quarterbacked
you must have quarterbacked
they must have quarterbacked	I must have been quarterbacking
you must have been quarterbacking
he must have been quarterbacking
we must have been quarterbacking
you must have been quarterbacking
they must have been quarterbacking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't quarterback
you mustn't quarterback
he mustn't quarterback
we mustn't quarterback
you mustn't quarterback
they mustn't quarterback 	I mustn't be quarterbacking
you mustn't be quarterbacking
he mustn't be quarterbacking
we mustn't be quarterbacking
you mustn't be quarterbacking
they mustn't be quarterbacking	I mustn't have quarterbacked
you mustn't have quarterbacked
he mustn't have quarterbacked
we mustn't have quarterbacked
you mustn't have quarterbacked
they mustn't have quarterbacked	I mustn't have been quarterbacking
you mustn't have been quarterbacking
he mustn't have been quarterbacking
we mustn't have been quarterbacking
you mustn't have been quarterbacking
they mustn't have been quarterbacking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I quarterback?
must you quarterback?
must he quarterback?
must we quarterback?
must you quarterback?
must they quarterback? 	must I be quarterbacking?
must you be quarterbacking?
must he be quarterbacking?
must we be quarterbacking?
must you be quarterbacking?
must they be quarterbacking? 	must I have quarterbacked?
must you have quarterbacked?
must he have quarterbacked?
must we have quarterbacked?
must you have quarterbacked?
must they have quarterbacked? 	must I have been quarterbacking?
must you have been quarterbacking?
must he have been quarterbacking?
must we have been quarterbacking?
must you have been quarterbacking?
must they have been quarterbacking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I quarterback?
mustn't you quarterback?
mustn't he quarterback?
mustn't we quarterback?
mustn't you quarterback?
mustn't they quarterback? 	mustn't I be quarterbacking?
mustn't you be quarterbacking?
mustn't he be quarterbacking?
mustn't we be quarterbacking?
mustn't you be quarterbacking?
mustn't they be quarterbacking? 	mustn't I have quarterbacked?
mustn't you have quarterbacked?
mustn't he have quarterbacked?
mustn't we have quarterbacked?
mustn't you have quarterbacked?
mustn't they have quarterbacked? 	mustn't I have been quarterbacking?
mustn't you have been quarterbacking?
mustn't he have been quarterbacking?
mustn't we have been quarterbacking?
mustn't you have been quarterbacking?
mustn't they have been quarterbacking?