can quarterback
Verbo regular: quarterback - quarterbacked- quarterbacked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can quarterback
you can quarterback
he can quarterback
we can quarterback
you can quarterback
they can quarterback 	I can be quarterbacking
you can be quarterbacking
he can be quarterbacking
we can be quarterbacking
you can be quarterbacking
they can be quarterbacking	I can have quarterbacked
you can have quarterbacked
he can have quarterbacked
we can have quarterbacked
you can have quarterbacked
they can have quarterbacked	I can have been quarterbacking
you can have been quarterbacking
he can have been quarterbacking
we can have been quarterbacking
you can have been quarterbacking
they can have been quarterbacking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't quarterback
you can't quarterback
he can't quarterback
we can't quarterback
you can't quarterback
they can't quarterback 	I can't be quarterbacking
you can't be quarterbacking
he can't be quarterbacking
we can't be quarterbacking
you can't be quarterbacking
they can't be quarterbacking	I can't have quarterbacked
you can't have quarterbacked
he can't have quarterbacked
we can't have quarterbacked
you can't have quarterbacked
they can't have quarterbacked	I can't have been quarterbacking
you can't have been quarterbacking
he can't have been quarterbacking
we can't have been quarterbacking
you can't have been quarterbacking
they can't have been quarterbacking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I quarterback?
can you quarterback?
can he quarterback?
can we quarterback?
can you quarterback?
can they quarterback? 	can I be quarterbacking?
can you be quarterbacking?
can he be quarterbacking?
can we be quarterbacking?
can you be quarterbacking?
can they be quarterbacking? 	can I have quarterbacked?
can you have quarterbacked?
can he have quarterbacked?
can we have quarterbacked?
can you have quarterbacked?
can they have quarterbacked? 	can I have been quarterbacking?
can you have been quarterbacking?
can he have been quarterbacking?
can we have been quarterbacking?
can you have been quarterbacking?
can they have been quarterbacking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I quarterback?
can't you quarterback?
can't he quarterback?
can't we quarterback?
can't you quarterback?
can't they quarterback? 	can't I be quarterbacking?
can't you be quarterbacking?
can't he be quarterbacking?
can't we be quarterbacking?
can't you be quarterbacking?
can't they be quarterbacking? 	can't I have quarterbacked?
can't you have quarterbacked?
can't he have quarterbacked?
can't we have quarterbacked?
can't you have quarterbacked?
can't they have quarterbacked? 	can't I have been quarterbacking?
can't you have been quarterbacking?
can't he have been quarterbacking?
can't we have been quarterbacking?
can't you have been quarterbacking?
can't they have been quarterbacking?