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 cannot quarterback
you cannot quarterback
he cannot quarterback
we cannot quarterback
you cannot quarterback
they cannot quarterback 	I cannot be quarterbacking
you cannot be quarterbacking
he cannot be quarterbacking
we cannot be quarterbacking
you cannot be quarterbacking
they cannot be quarterbacking	I cannot have quarterbacked
you cannot have quarterbacked
he cannot have quarterbacked
we cannot have quarterbacked
you cannot have quarterbacked
they cannot have quarterbacked	I cannot have been quarterbacking
you cannot have been quarterbacking
he cannot have been quarterbacking
we cannot have been quarterbacking
you cannot have been quarterbacking
they cannot 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 I not quarterback?
can you not quarterback?
can he not quarterback?
can we not quarterback?
can you not quarterback?
can they not quarterback? 	can I not be quarterbacking?
can you not be quarterbacking?
can he not be quarterbacking?
can we not be quarterbacking?
can you not be quarterbacking?
can they not be quarterbacking? 	can I not have quarterbacked?
can you not have quarterbacked?
can he not have quarterbacked?
can we not have quarterbacked?
can you not have quarterbacked?
can they not have quarterbacked? 	can I not have been quarterbacking?
can you not have been quarterbacking?
can he not have been quarterbacking?
can we not have been quarterbacking?
can you not have been quarterbacking?
can they not have been quarterbacking?