may staple
Regular verb: staple - stapled- stapled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may staple
you may staple
he may staple
we may staple
you may staple
they may staple 	I may be stapling
you may be stapling
he may be stapling
we may be stapling
you may be stapling
they may be stapling	I may have stapled
you may have stapled
he may have stapled
we may have stapled
you may have stapled
they may have stapled	I may have been stapling
you may have been stapling
he may have been stapling
we may have been stapling
you may have been stapling
they may have been stapling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't staple
you mayn't staple
he mayn't staple
we mayn't staple
you mayn't staple
they mayn't staple 	I mayn't be stapling
you mayn't be stapling
he mayn't be stapling
we mayn't be stapling
you mayn't be stapling
they mayn't be stapling	I mayn't have stapled
you mayn't have stapled
he mayn't have stapled
we mayn't have stapled
you mayn't have stapled
they mayn't have stapled	I mayn't have been stapling
you mayn't have been stapling
he mayn't have been stapling
we mayn't have been stapling
you mayn't have been stapling
they mayn't have been stapling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I staple?
may you staple?
may he staple?
may we staple?
may you staple?
may they staple? 	may I be stapling?
may you be stapling?
may he be stapling?
may we be stapling?
may you be stapling?
may they be stapling? 	may I have stapled?
may you have stapled?
may he have stapled?
may we have stapled?
may you have stapled?
may they have stapled? 	may I have been stapling?
may you have been stapling?
may he have been stapling?
may we have been stapling?
may you have been stapling?
may they have been stapling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I staple?
mayn't you staple?
mayn't he staple?
mayn't we staple?
mayn't you staple?
mayn't they staple? 	mayn't I be stapling?
mayn't you be stapling?
mayn't he be stapling?
mayn't we be stapling?
mayn't you be stapling?
mayn't they be stapling? 	mayn't I have stapled?
mayn't you have stapled?
mayn't he have stapled?
mayn't we have stapled?
mayn't you have stapled?
mayn't they have stapled? 	mayn't I have been stapling?
mayn't you have been stapling?
mayn't he have been stapling?
mayn't we have been stapling?
mayn't you have been stapling?
mayn't they have been stapling?