may discolour
Regular verb: discolour - discoloured- discoloured

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

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

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

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