could quicksilver
Verbo regular: quicksilver - quicksilvered- quicksilvered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could quicksilver
you could quicksilver
he could quicksilver
we could quicksilver
you could quicksilver
they could quicksilver 	I could be quicksilvering
you could be quicksilvering
he could be quicksilvering
we could be quicksilvering
you could be quicksilvering
they could be quicksilvering	I could have quicksilvered
you could have quicksilvered
he could have quicksilvered
we could have quicksilvered
you could have quicksilvered
they could have quicksilvered	I could have been quicksilvering
you could have been quicksilvering
he could have been quicksilvering
we could have been quicksilvering
you could have been quicksilvering
they could have been quicksilvering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't quicksilver
you couldn't quicksilver
he couldn't quicksilver
we couldn't quicksilver
you couldn't quicksilver
they couldn't quicksilver 	I couldn't be quicksilvering
you couldn't be quicksilvering
he couldn't be quicksilvering
we couldn't be quicksilvering
you couldn't be quicksilvering
they couldn't be quicksilvering	I couldn't have quicksilvered
you couldn't have quicksilvered
he couldn't have quicksilvered
we couldn't have quicksilvered
you couldn't have quicksilvered
they couldn't have quicksilvered	I couldn't have been quicksilvering
you couldn't have been quicksilvering
he couldn't have been quicksilvering
we couldn't have been quicksilvering
you couldn't have been quicksilvering
they couldn't have been quicksilvering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I quicksilver?
could you quicksilver?
could he quicksilver?
could we quicksilver?
could you quicksilver?
could they quicksilver? 	could I be quicksilvering?
could you be quicksilvering?
could he be quicksilvering?
could we be quicksilvering?
could you be quicksilvering?
could they be quicksilvering? 	could I have quicksilvered?
could you have quicksilvered?
could he have quicksilvered?
could we have quicksilvered?
could you have quicksilvered?
could they have quicksilvered? 	could I have been quicksilvering?
could you have been quicksilvering?
could he have been quicksilvering?
could we have been quicksilvering?
could you have been quicksilvering?
could they have been quicksilvering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I quicksilver?
couldn't you quicksilver?
couldn't he quicksilver?
couldn't we quicksilver?
couldn't you quicksilver?
couldn't they quicksilver? 	couldn't I be quicksilvering?
couldn't you be quicksilvering?
couldn't he be quicksilvering?
couldn't we be quicksilvering?
couldn't you be quicksilvering?
couldn't they be quicksilvering? 	couldn't I have quicksilvered?
couldn't you have quicksilvered?
couldn't he have quicksilvered?
couldn't we have quicksilvered?
couldn't you have quicksilvered?
couldn't they have quicksilvered? 	couldn't I have been quicksilvering?
couldn't you have been quicksilvering?
couldn't he have been quicksilvering?
couldn't we have been quicksilvering?
couldn't you have been quicksilvering?
couldn't they have been quicksilvering?