may trepan
Regular verb: trepan - trepanned- trepanned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may trepan
you may trepan
he may trepan
we may trepan
you may trepan
they may trepan 	I may be trepanning
you may be trepanning
he may be trepanning
we may be trepanning
you may be trepanning
they may be trepanning	I may have trepanned
you may have trepanned
he may have trepanned
we may have trepanned
you may have trepanned
they may have trepanned	I may have been trepanning
you may have been trepanning
he may have been trepanning
we may have been trepanning
you may have been trepanning
they may have been trepanning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't trepan
you mayn't trepan
he mayn't trepan
we mayn't trepan
you mayn't trepan
they mayn't trepan 	I mayn't be trepanning
you mayn't be trepanning
he mayn't be trepanning
we mayn't be trepanning
you mayn't be trepanning
they mayn't be trepanning	I mayn't have trepanned
you mayn't have trepanned
he mayn't have trepanned
we mayn't have trepanned
you mayn't have trepanned
they mayn't have trepanned	I mayn't have been trepanning
you mayn't have been trepanning
he mayn't have been trepanning
we mayn't have been trepanning
you mayn't have been trepanning
they mayn't have been trepanning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I trepan?
may you trepan?
may he trepan?
may we trepan?
may you trepan?
may they trepan? 	may I be trepanning?
may you be trepanning?
may he be trepanning?
may we be trepanning?
may you be trepanning?
may they be trepanning? 	may I have trepanned?
may you have trepanned?
may he have trepanned?
may we have trepanned?
may you have trepanned?
may they have trepanned? 	may I have been trepanning?
may you have been trepanning?
may he have been trepanning?
may we have been trepanning?
may you have been trepanning?
may they have been trepanning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I trepan?
mayn't you trepan?
mayn't he trepan?
mayn't we trepan?
mayn't you trepan?
mayn't they trepan? 	mayn't I be trepanning?
mayn't you be trepanning?
mayn't he be trepanning?
mayn't we be trepanning?
mayn't you be trepanning?
mayn't they be trepanning? 	mayn't I have trepanned?
mayn't you have trepanned?
mayn't he have trepanned?
mayn't we have trepanned?
mayn't you have trepanned?
mayn't they have trepanned? 	mayn't I have been trepanning?
mayn't you have been trepanning?
mayn't he have been trepanning?
mayn't we have been trepanning?
mayn't you have been trepanning?
mayn't they have been trepanning?