may precancel
Regular verb: precancel - precanceled- precanceled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may precancel
you may precancel
he may precancel
we may precancel
you may precancel
they may precancel 	I may be precanceling
you may be precanceling
he may be precanceling
we may be precanceling
you may be precanceling
they may be precanceling	I may have precanceled
you may have precanceled
he may have precanceled
we may have precanceled
you may have precanceled
they may have precanceled	I may have been precanceling
you may have been precanceling
he may have been precanceling
we may have been precanceling
you may have been precanceling
they may have been precanceling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't precancel
you mayn't precancel
he mayn't precancel
we mayn't precancel
you mayn't precancel
they mayn't precancel 	I mayn't be precanceling
you mayn't be precanceling
he mayn't be precanceling
we mayn't be precanceling
you mayn't be precanceling
they mayn't be precanceling	I mayn't have precanceled
you mayn't have precanceled
he mayn't have precanceled
we mayn't have precanceled
you mayn't have precanceled
they mayn't have precanceled	I mayn't have been precanceling
you mayn't have been precanceling
he mayn't have been precanceling
we mayn't have been precanceling
you mayn't have been precanceling
they mayn't have been precanceling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I precancel?
may you precancel?
may he precancel?
may we precancel?
may you precancel?
may they precancel? 	may I be precanceling?
may you be precanceling?
may he be precanceling?
may we be precanceling?
may you be precanceling?
may they be precanceling? 	may I have precanceled?
may you have precanceled?
may he have precanceled?
may we have precanceled?
may you have precanceled?
may they have precanceled? 	may I have been precanceling?
may you have been precanceling?
may he have been precanceling?
may we have been precanceling?
may you have been precanceling?
may they have been precanceling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I precancel?
mayn't you precancel?
mayn't he precancel?
mayn't we precancel?
mayn't you precancel?
mayn't they precancel? 	mayn't I be precanceling?
mayn't you be precanceling?
mayn't he be precanceling?
mayn't we be precanceling?
mayn't you be precanceling?
mayn't they be precanceling? 	mayn't I have precanceled?
mayn't you have precanceled?
mayn't he have precanceled?
mayn't we have precanceled?
mayn't you have precanceled?
mayn't they have precanceled? 	mayn't I have been precanceling?
mayn't you have been precanceling?
mayn't he have been precanceling?
mayn't we have been precanceling?
mayn't you have been precanceling?
mayn't they have been precanceling?