may postmark
Regular verb: postmark - postmarked- postmarked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may postmark
you may postmark
she may postmark
we may postmark
you may postmark
they may postmark 	I may be postmarking
you may be postmarking
she may be postmarking
we may be postmarking
you may be postmarking
they may be postmarking	I may have postmarked
you may have postmarked
she may have postmarked
we may have postmarked
you may have postmarked
they may have postmarked	I may have been postmarking
you may have been postmarking
she may have been postmarking
we may have been postmarking
you may have been postmarking
they may have been postmarking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't postmark
you mayn't postmark
she mayn't postmark
we mayn't postmark
you mayn't postmark
they mayn't postmark 	I mayn't be postmarking
you mayn't be postmarking
she mayn't be postmarking
we mayn't be postmarking
you mayn't be postmarking
they mayn't be postmarking	I mayn't have postmarked
you mayn't have postmarked
she mayn't have postmarked
we mayn't have postmarked
you mayn't have postmarked
they mayn't have postmarked	I mayn't have been postmarking
you mayn't have been postmarking
she mayn't have been postmarking
we mayn't have been postmarking
you mayn't have been postmarking
they mayn't have been postmarking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I postmark?
may you postmark?
may she postmark?
may we postmark?
may you postmark?
may they postmark? 	may I be postmarking?
may you be postmarking?
may she be postmarking?
may we be postmarking?
may you be postmarking?
may they be postmarking? 	may I have postmarked?
may you have postmarked?
may she have postmarked?
may we have postmarked?
may you have postmarked?
may they have postmarked? 	may I have been postmarking?
may you have been postmarking?
may she have been postmarking?
may we have been postmarking?
may you have been postmarking?
may they have been postmarking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I postmark?
mayn't you postmark?
mayn't she postmark?
mayn't we postmark?
mayn't you postmark?
mayn't they postmark? 	mayn't I be postmarking?
mayn't you be postmarking?
mayn't she be postmarking?
mayn't we be postmarking?
mayn't you be postmarking?
mayn't they be postmarking? 	mayn't I have postmarked?
mayn't you have postmarked?
mayn't she have postmarked?
mayn't we have postmarked?
mayn't you have postmarked?
mayn't they have postmarked? 	mayn't I have been postmarking?
mayn't you have been postmarking?
mayn't she have been postmarking?
mayn't we have been postmarking?
mayn't you have been postmarking?
mayn't they have been postmarking?