I may discolour you may discolour she may discolour we may discolour you may discolour they may discolour
V-ing form
I may be discolouring you may be discolouring she may be discolouring we may be discolouring you may be discolouring they may be discolouring
Perfect
I may have discoloured you may have discoloured she may have discoloured we may have discoloured you may have discoloured they may have discoloured
V-ing perfect
I may have been discolouring you may have been discolouring she may have been discolouring we may have been discolouring you may have been discolouring they may have been discolouring
Negation
Simple form
I may not discolour you may not discolour she may not discolour we may not discolour you may not discolour they may not discolour
V-ing form
I may not be discolouring you may not be discolouring she may not be discolouring we may not be discolouring you may not be discolouring they may not be discolouring
Perfect
I may not have discoloured you may not have discoloured she may not have discoloured we may not have discoloured you may not have discoloured they may not have discoloured
V-ing perfect
I may not have been discolouring you may not have been discolouring she may not have been discolouring we may not have been discolouring you may not have been discolouring they may not have been discolouring
Interrogative form
Simple form
may I discolour? may you discolour? may she discolour? may we discolour? may you discolour? may they discolour?
V-ing form
may I be discolouring? may you be discolouring? may she be discolouring? may we be discolouring? may you be discolouring? may they be discolouring?
Perfect
may I have discoloured? may you have discoloured? may she have discoloured? may we have discoloured? may you have discoloured? may they have discoloured?
V-ing perfect
may I have been discolouring? may you have been discolouring? may she have been discolouring? may we have been discolouring? may you have been discolouring? may they have been discolouring?
Interro-negative form
Simple form
may I not discolour? may you not discolour? may she not discolour? may we not discolour? may you not discolour? may they not discolour?
V-ing form
may I not be discolouring? may you not be discolouring? may she not be discolouring? may we not be discolouring? may you not be discolouring? may they not be discolouring?
Perfect
may I not have discoloured? may you not have discoloured? may she not have discoloured? may we not have discoloured? may you not have discoloured? may they not have discoloured?
V-ing perfect
may I not have been discolouring? may you not have been discolouring? may she not have been discolouring? may we not have been discolouring? may you not have been discolouring? may they not have been discolouring?