could discolour
Verbo regular: discolour - discoloured- discoloured

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could discolour
you could discolour
he could discolour
we could discolour
you could discolour
they could discolour 	I could be discolouring
you could be discolouring
he could be discolouring
we could be discolouring
you could be discolouring
they could be discolouring	I could have discoloured
you could have discoloured
he could have discoloured
we could have discoloured
you could have discoloured
they could have discoloured	I could have been discolouring
you could have been discolouring
he could have been discolouring
we could have been discolouring
you could have been discolouring
they could have been discolouring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not discolour
you could not discolour
he could not discolour
we could not discolour
you could not discolour
they could not discolour 	I could not be discolouring
you could not be discolouring
he could not be discolouring
we could not be discolouring
you could not be discolouring
they could not be discolouring	I could not have discoloured
you could not have discoloured
he could not have discoloured
we could not have discoloured
you could not have discoloured
they could not have discoloured	I could not have been discolouring
you could not have been discolouring
he could not have been discolouring
we could not have been discolouring
you could not have been discolouring
they could not have been discolouring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I discolour?
could you discolour?
could he discolour?
could we discolour?
could you discolour?
could they discolour? 	could I be discolouring?
could you be discolouring?
could he be discolouring?
could we be discolouring?
could you be discolouring?
could they be discolouring? 	could I have discoloured?
could you have discoloured?
could he have discoloured?
could we have discoloured?
could you have discoloured?
could they have discoloured? 	could I have been discolouring?
could you have been discolouring?
could he have been discolouring?
could we have been discolouring?
could you have been discolouring?
could they have been discolouring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not discolour?
could you not discolour?
could he not discolour?
could we not discolour?
could you not discolour?
could they not discolour? 	could I not be discolouring?
could you not be discolouring?
could he not be discolouring?
could we not be discolouring?
could you not be discolouring?
could they not be discolouring? 	could I not have discoloured?
could you not have discoloured?
could he not have discoloured?
could we not have discoloured?
could you not have discoloured?
could they not have discoloured? 	could I not have been discolouring?
could you not have been discolouring?
could he not have been discolouring?
could we not have been discolouring?
could you not have been discolouring?
could they not have been discolouring?