could cancel
Verbo regular: cancel - cancelled- cancelled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could cancel
you could cancel
he could cancel
we could cancel
you could cancel
they could cancel 	I could be cancelling
you could be cancelling
he could be cancelling
we could be cancelling
you could be cancelling
they could be cancelling	I could have cancelled
you could have cancelled
he could have cancelled
we could have cancelled
you could have cancelled
they could have cancelled	I could have been cancelling
you could have been cancelling
he could have been cancelling
we could have been cancelling
you could have been cancelling
they could have been cancelling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not cancel
you could not cancel
he could not cancel
we could not cancel
you could not cancel
they could not cancel 	I could not be cancelling
you could not be cancelling
he could not be cancelling
we could not be cancelling
you could not be cancelling
they could not be cancelling	I could not have cancelled
you could not have cancelled
he could not have cancelled
we could not have cancelled
you could not have cancelled
they could not have cancelled	I could not have been cancelling
you could not have been cancelling
he could not have been cancelling
we could not have been cancelling
you could not have been cancelling
they could not have been cancelling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I cancel?
could you cancel?
could he cancel?
could we cancel?
could you cancel?
could they cancel? 	could I be cancelling?
could you be cancelling?
could he be cancelling?
could we be cancelling?
could you be cancelling?
could they be cancelling? 	could I have cancelled?
could you have cancelled?
could he have cancelled?
could we have cancelled?
could you have cancelled?
could they have cancelled? 	could I have been cancelling?
could you have been cancelling?
could he have been cancelling?
could we have been cancelling?
could you have been cancelling?
could they have been cancelling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not cancel?
could you not cancel?
could he not cancel?
could we not cancel?
could you not cancel?
could they not cancel? 	could I not be cancelling?
could you not be cancelling?
could he not be cancelling?
could we not be cancelling?
could you not be cancelling?
could they not be cancelling? 	could I not have cancelled?
could you not have cancelled?
could he not have cancelled?
could we not have cancelled?
could you not have cancelled?
could they not have cancelled? 	could I not have been cancelling?
could you not have been cancelling?
could he not have been cancelling?
could we not have been cancelling?
could you not have been cancelling?
could they not have been cancelling?