may slack
Regular verb: slack - slacked- slacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may slack
you may slack
he may slack
we may slack
you may slack
they may slack 	I may be slacking
you may be slacking
he may be slacking
we may be slacking
you may be slacking
they may be slacking	I may have slacked
you may have slacked
he may have slacked
we may have slacked
you may have slacked
they may have slacked	I may have been slacking
you may have been slacking
he may have been slacking
we may have been slacking
you may have been slacking
they may have been slacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't slack
you mayn't slack
he mayn't slack
we mayn't slack
you mayn't slack
they mayn't slack 	I mayn't be slacking
you mayn't be slacking
he mayn't be slacking
we mayn't be slacking
you mayn't be slacking
they mayn't be slacking	I mayn't have slacked
you mayn't have slacked
he mayn't have slacked
we mayn't have slacked
you mayn't have slacked
they mayn't have slacked	I mayn't have been slacking
you mayn't have been slacking
he mayn't have been slacking
we mayn't have been slacking
you mayn't have been slacking
they mayn't have been slacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I slack?
may you slack?
may he slack?
may we slack?
may you slack?
may they slack? 	may I be slacking?
may you be slacking?
may he be slacking?
may we be slacking?
may you be slacking?
may they be slacking? 	may I have slacked?
may you have slacked?
may he have slacked?
may we have slacked?
may you have slacked?
may they have slacked? 	may I have been slacking?
may you have been slacking?
may he have been slacking?
may we have been slacking?
may you have been slacking?
may they have been slacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I slack?
mayn't you slack?
mayn't he slack?
mayn't we slack?
mayn't you slack?
mayn't they slack? 	mayn't I be slacking?
mayn't you be slacking?
mayn't he be slacking?
mayn't we be slacking?
mayn't you be slacking?
mayn't they be slacking? 	mayn't I have slacked?
mayn't you have slacked?
mayn't he have slacked?
mayn't we have slacked?
mayn't you have slacked?
mayn't they have slacked? 	mayn't I have been slacking?
mayn't you have been slacking?
mayn't he have been slacking?
mayn't we have been slacking?
mayn't you have been slacking?
mayn't they have been slacking?