could sponge
Verbo regular: sponge - sponged- sponged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could sponge
you could sponge
she could sponge
we could sponge
you could sponge
they could sponge 	I could be sponging
you could be sponging
she could be sponging
we could be sponging
you could be sponging
they could be sponging	I could have sponged
you could have sponged
she could have sponged
we could have sponged
you could have sponged
they could have sponged	I could have been sponging
you could have been sponging
she could have been sponging
we could have been sponging
you could have been sponging
they could have been sponging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not sponge
you could not sponge
she could not sponge
we could not sponge
you could not sponge
they could not sponge 	I could not be sponging
you could not be sponging
she could not be sponging
we could not be sponging
you could not be sponging
they could not be sponging	I could not have sponged
you could not have sponged
she could not have sponged
we could not have sponged
you could not have sponged
they could not have sponged	I could not have been sponging
you could not have been sponging
she could not have been sponging
we could not have been sponging
you could not have been sponging
they could not have been sponging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I sponge?
could you sponge?
could she sponge?
could we sponge?
could you sponge?
could they sponge? 	could I be sponging?
could you be sponging?
could she be sponging?
could we be sponging?
could you be sponging?
could they be sponging? 	could I have sponged?
could you have sponged?
could she have sponged?
could we have sponged?
could you have sponged?
could they have sponged? 	could I have been sponging?
could you have been sponging?
could she have been sponging?
could we have been sponging?
could you have been sponging?
could they have been sponging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not sponge?
could you not sponge?
could she not sponge?
could we not sponge?
could you not sponge?
could they not sponge? 	could I not be sponging?
could you not be sponging?
could she not be sponging?
could we not be sponging?
could you not be sponging?
could they not be sponging? 	could I not have sponged?
could you not have sponged?
could she not have sponged?
could we not have sponged?
could you not have sponged?
could they not have sponged? 	could I not have been sponging?
could you not have been sponging?
could she not have been sponging?
could we not have been sponging?
could you not have been sponging?
could they not have been sponging?