Conjugação do verbo inglês
COULD RETROACT

Verbo regular: retroact - retroacted - retroacted

Afirmação

Forma simple	Forma com V-ing
I could retroact you could retroact she could retroact we could retroact you could retroact they could retroact	I could be retroacting you could be retroacting she could be retroacting we could be retroacting you could be retroacting they could be retroacting
Perfeito	Perfeito com V-ing
I could have retroacted you could have retroacted she 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 she could have been retroacting we could have been retroacting you could have been retroacting they could have been retroacting

Negação

Forma simple	Forma com V-ing
I could not retroact you could not retroact she could not retroact we could not retroact you could not retroact they could not retroact	I could not be retroacting you could not be retroacting she could not be retroacting we could not be retroacting you could not be retroacting they could not be retroacting
Perfeito	Perfeito com V-ing
I could not have retroacted you could not have retroacted she could not have retroacted we could not have retroacted you could not have retroacted they could not have retroacted	I could not have been retroacting you could not have been retroacting she could not have been retroacting we could not have been retroacting you could not have been retroacting they could not have been retroacting

Forma interrogativa

Forma simple	Forma com V-ing
could I retroact? could you retroact? could she retroact? could we retroact? could you retroact? could they retroact?	could I be retroacting? could you be retroacting? could she be retroacting? could we be retroacting? could you be retroacting? could they be retroacting?
Perfeito	Perfeito com V-ing
could I have retroacted? could you have retroacted? could she 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 she have been retroacting? could we have been retroacting? could you have been retroacting? could they have been retroacting?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not retroact? could you not retroact? could she not retroact? could we not retroact? could you not retroact? could they not retroact?	could I not be retroacting? could you not be retroacting? could she not be retroacting? could we not be retroacting? could you not be retroacting? could they not be retroacting?
Perfeito	Perfeito com V-ing
could I not have retroacted? could you not have retroacted? could she not have retroacted? could we not have retroacted? could you not have retroacted? could they not have retroacted?	could I not have been retroacting? could you not have been retroacting? could she not have been retroacting? could we not have been retroacting? could you not have been retroacting? could they not have been retroacting?