can discolour
Regular verb: discolour - discoloured- discoloured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can discolour
you can discolour
he can discolour
we can discolour
you can discolour
they can discolour 	I can be discolouring
you can be discolouring
he can be discolouring
we can be discolouring
you can be discolouring
they can be discolouring	I can have discoloured
you can have discoloured
he can have discoloured
we can have discoloured
you can have discoloured
they can have discoloured	I can have been discolouring
you can have been discolouring
he can have been discolouring
we can have been discolouring
you can have been discolouring
they can have been discolouring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't discolour
you can't discolour
he can't discolour
we can't discolour
you can't discolour
they can't discolour 	I can't be discolouring
you can't be discolouring
he can't be discolouring
we can't be discolouring
you can't be discolouring
they can't be discolouring	I can't have discoloured
you can't have discoloured
he can't have discoloured
we can't have discoloured
you can't have discoloured
they can't have discoloured	I can't have been discolouring
you can't have been discolouring
he can't have been discolouring
we can't have been discolouring
you can't have been discolouring
they can't have been discolouring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I discolour?
can you discolour?
can he discolour?
can we discolour?
can you discolour?
can they discolour? 	can I be discolouring?
can you be discolouring?
can he be discolouring?
can we be discolouring?
can you be discolouring?
can they be discolouring? 	can I have discoloured?
can you have discoloured?
can he have discoloured?
can we have discoloured?
can you have discoloured?
can they have discoloured? 	can I have been discolouring?
can you have been discolouring?
can he have been discolouring?
can we have been discolouring?
can you have been discolouring?
can they have been discolouring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I discolour?
can't you discolour?
can't he discolour?
can't we discolour?
can't you discolour?
can't they discolour? 	can't I be discolouring?
can't you be discolouring?
can't he be discolouring?
can't we be discolouring?
can't you be discolouring?
can't they be discolouring? 	can't I have discoloured?
can't you have discoloured?
can't he have discoloured?
can't we have discoloured?
can't you have discoloured?
can't they have discoloured? 	can't I have been discolouring?
can't you have been discolouring?
can't he have been discolouring?
can't we have been discolouring?
can't you have been discolouring?
can't they have been discolouring?