could fold
Verbo regular: fold - folded- folded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could fold
you could fold
he could fold
we could fold
you could fold
they could fold 	I could be folding
you could be folding
he could be folding
we could be folding
you could be folding
they could be folding	I could have folded
you could have folded
he could have folded
we could have folded
you could have folded
they could have folded	I could have been folding
you could have been folding
he could have been folding
we could have been folding
you could have been folding
they could have been folding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not fold
you could not fold
he could not fold
we could not fold
you could not fold
they could not fold 	I could not be folding
you could not be folding
he could not be folding
we could not be folding
you could not be folding
they could not be folding	I could not have folded
you could not have folded
he could not have folded
we could not have folded
you could not have folded
they could not have folded	I could not have been folding
you could not have been folding
he could not have been folding
we could not have been folding
you could not have been folding
they could not have been folding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I fold?
could you fold?
could he fold?
could we fold?
could you fold?
could they fold? 	could I be folding?
could you be folding?
could he be folding?
could we be folding?
could you be folding?
could they be folding? 	could I have folded?
could you have folded?
could he have folded?
could we have folded?
could you have folded?
could they have folded? 	could I have been folding?
could you have been folding?
could he have been folding?
could we have been folding?
could you have been folding?
could they have been folding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not fold?
could you not fold?
could he not fold?
could we not fold?
could you not fold?
could they not fold? 	could I not be folding?
could you not be folding?
could he not be folding?
could we not be folding?
could you not be folding?
could they not be folding? 	could I not have folded?
could you not have folded?
could he not have folded?
could we not have folded?
could you not have folded?
could they not have folded? 	could I not have been folding?
could you not have been folding?
could he not have been folding?
could we not have been folding?
could you not have been folding?
could they not have been folding?