English verb conjugation
SHOULD RETROACT

Regular verb: retroact - retroacted - retroacted

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?