should retroact
Regular verb: retroact - retroacted- retroacted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd retroact
you'd retroact
he'd retroact
we'd retroact
you'd retroact
they'd retroact 	I'd be retroacting
you'd be retroacting
he'd be retroacting
we'd be retroacting
you'd be retroacting
they'd be retroacting	I should've retroacted
you should've retroacted
he should've retroacted
we should've retroacted
you should've retroacted
they should've retroacted	I should've been retroacting
you should've been retroacting
he should've been retroacting
we should've been retroacting
you should've been retroacting
they should've been retroacting	

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

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

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