could unfold
Verbo regular: unfold - unfolded- unfolded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could unfold
you could unfold
she could unfold
we could unfold
you could unfold
they could unfold 	I could be unfolding
you could be unfolding
she could be unfolding
we could be unfolding
you could be unfolding
they could be unfolding	I could have unfolded
you could have unfolded
she could have unfolded
we could have unfolded
you could have unfolded
they could have unfolded	I could have been unfolding
you could have been unfolding
she could have been unfolding
we could have been unfolding
you could have been unfolding
they could have been unfolding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not unfold
you could not unfold
she could not unfold
we could not unfold
you could not unfold
they could not unfold 	I could not be unfolding
you could not be unfolding
she could not be unfolding
we could not be unfolding
you could not be unfolding
they could not be unfolding	I could not have unfolded
you could not have unfolded
she could not have unfolded
we could not have unfolded
you could not have unfolded
they could not have unfolded	I could not have been unfolding
you could not have been unfolding
she could not have been unfolding
we could not have been unfolding
you could not have been unfolding
they could not have been unfolding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I unfold?
could you unfold?
could she unfold?
could we unfold?
could you unfold?
could they unfold? 	could I be unfolding?
could you be unfolding?
could she be unfolding?
could we be unfolding?
could you be unfolding?
could they be unfolding? 	could I have unfolded?
could you have unfolded?
could she have unfolded?
could we have unfolded?
could you have unfolded?
could they have unfolded? 	could I have been unfolding?
could you have been unfolding?
could she have been unfolding?
could we have been unfolding?
could you have been unfolding?
could they have been unfolding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not unfold?
could you not unfold?
could she not unfold?
could we not unfold?
could you not unfold?
could they not unfold? 	could I not be unfolding?
could you not be unfolding?
could she not be unfolding?
could we not be unfolding?
could you not be unfolding?
could they not be unfolding? 	could I not have unfolded?
could you not have unfolded?
could she not have unfolded?
could we not have unfolded?
could you not have unfolded?
could they not have unfolded? 	could I not have been unfolding?
could you not have been unfolding?
could she not have been unfolding?
could we not have been unfolding?
could you not have been unfolding?
could they not have been unfolding?