English verb conjugation
COULD RETROACT

Regular verb: retroact - retroacted - retroacted

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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