may tack
Regular verb: tack - tacked- tacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may tack
you may tack
she may tack
we may tack
you may tack
they may tack 	I may be tacking
you may be tacking
she may be tacking
we may be tacking
you may be tacking
they may be tacking	I may have tacked
you may have tacked
she may have tacked
we may have tacked
you may have tacked
they may have tacked	I may have been tacking
you may have been tacking
she may have been tacking
we may have been tacking
you may have been tacking
they may have been tacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't tack
you mayn't tack
she mayn't tack
we mayn't tack
you mayn't tack
they mayn't tack 	I mayn't be tacking
you mayn't be tacking
she mayn't be tacking
we mayn't be tacking
you mayn't be tacking
they mayn't be tacking	I mayn't have tacked
you mayn't have tacked
she mayn't have tacked
we mayn't have tacked
you mayn't have tacked
they mayn't have tacked	I mayn't have been tacking
you mayn't have been tacking
she mayn't have been tacking
we mayn't have been tacking
you mayn't have been tacking
they mayn't have been tacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I tack?
may you tack?
may she tack?
may we tack?
may you tack?
may they tack? 	may I be tacking?
may you be tacking?
may she be tacking?
may we be tacking?
may you be tacking?
may they be tacking? 	may I have tacked?
may you have tacked?
may she have tacked?
may we have tacked?
may you have tacked?
may they have tacked? 	may I have been tacking?
may you have been tacking?
may she have been tacking?
may we have been tacking?
may you have been tacking?
may they have been tacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I tack?
mayn't you tack?
mayn't she tack?
mayn't we tack?
mayn't you tack?
mayn't they tack? 	mayn't I be tacking?
mayn't you be tacking?
mayn't she be tacking?
mayn't we be tacking?
mayn't you be tacking?
mayn't they be tacking? 	mayn't I have tacked?
mayn't you have tacked?
mayn't she have tacked?
mayn't we have tacked?
mayn't you have tacked?
mayn't they have tacked? 	mayn't I have been tacking?
mayn't you have been tacking?
mayn't she have been tacking?
mayn't we have been tacking?
mayn't you have been tacking?
mayn't they have been tacking?