may retroact
Regular verb: retroact - retroacted- retroacted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may retroact
you may retroact
he may retroact
we may retroact
you may retroact
they may retroact 	I may be retroacting
you may be retroacting
he may be retroacting
we may be retroacting
you may be retroacting
they may be retroacting	I may have retroacted
you may have retroacted
he may have retroacted
we may have retroacted
you may have retroacted
they may have retroacted	I may have been retroacting
you may have been retroacting
he may have been retroacting
we may have been retroacting
you may have been retroacting
they may have been retroacting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't retroact
you mayn't retroact
he mayn't retroact
we mayn't retroact
you mayn't retroact
they mayn't retroact 	I mayn't be retroacting
you mayn't be retroacting
he mayn't be retroacting
we mayn't be retroacting
you mayn't be retroacting
they mayn't be retroacting	I mayn't have retroacted
you mayn't have retroacted
he mayn't have retroacted
we mayn't have retroacted
you mayn't have retroacted
they mayn't have retroacted	I mayn't have been retroacting
you mayn't have been retroacting
he mayn't have been retroacting
we mayn't have been retroacting
you mayn't have been retroacting
they mayn't have been retroacting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I retroact?
may you retroact?
may he retroact?
may we retroact?
may you retroact?
may they retroact? 	may I be retroacting?
may you be retroacting?
may he be retroacting?
may we be retroacting?
may you be retroacting?
may they be retroacting? 	may I have retroacted?
may you have retroacted?
may he have retroacted?
may we have retroacted?
may you have retroacted?
may they have retroacted? 	may I have been retroacting?
may you have been retroacting?
may he have been retroacting?
may we have been retroacting?
may you have been retroacting?
may they have been retroacting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I retroact?
mayn't you retroact?
mayn't he retroact?
mayn't we retroact?
mayn't you retroact?
mayn't they retroact? 	mayn't I be retroacting?
mayn't you be retroacting?
mayn't he be retroacting?
mayn't we be retroacting?
mayn't you be retroacting?
mayn't they be retroacting? 	mayn't I have retroacted?
mayn't you have retroacted?
mayn't he have retroacted?
mayn't we have retroacted?
mayn't you have retroacted?
mayn't they have retroacted? 	mayn't I have been retroacting?
mayn't you have been retroacting?
mayn't he have been retroacting?
mayn't we have been retroacting?
mayn't you have been retroacting?
mayn't they have been retroacting?