could underseal
Verbo regular: underseal - undersealed- undersealed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could underseal
you could underseal
he could underseal
we could underseal
you could underseal
they could underseal 	I could be undersealing
you could be undersealing
he could be undersealing
we could be undersealing
you could be undersealing
they could be undersealing	I could have undersealed
you could have undersealed
he could have undersealed
we could have undersealed
you could have undersealed
they could have undersealed	I could have been undersealing
you could have been undersealing
he could have been undersealing
we could have been undersealing
you could have been undersealing
they could have been undersealing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not underseal
you could not underseal
he could not underseal
we could not underseal
you could not underseal
they could not underseal 	I could not be undersealing
you could not be undersealing
he could not be undersealing
we could not be undersealing
you could not be undersealing
they could not be undersealing	I could not have undersealed
you could not have undersealed
he could not have undersealed
we could not have undersealed
you could not have undersealed
they could not have undersealed	I could not have been undersealing
you could not have been undersealing
he could not have been undersealing
we could not have been undersealing
you could not have been undersealing
they could not have been undersealing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I underseal?
could you underseal?
could he underseal?
could we underseal?
could you underseal?
could they underseal? 	could I be undersealing?
could you be undersealing?
could he be undersealing?
could we be undersealing?
could you be undersealing?
could they be undersealing? 	could I have undersealed?
could you have undersealed?
could he have undersealed?
could we have undersealed?
could you have undersealed?
could they have undersealed? 	could I have been undersealing?
could you have been undersealing?
could he have been undersealing?
could we have been undersealing?
could you have been undersealing?
could they have been undersealing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not underseal?
could you not underseal?
could he not underseal?
could we not underseal?
could you not underseal?
could they not underseal? 	could I not be undersealing?
could you not be undersealing?
could he not be undersealing?
could we not be undersealing?
could you not be undersealing?
could they not be undersealing? 	could I not have undersealed?
could you not have undersealed?
could he not have undersealed?
could we not have undersealed?
could you not have undersealed?
could they not have undersealed? 	could I not have been undersealing?
could you not have been undersealing?
could he not have been undersealing?
could we not have been undersealing?
could you not have been undersealing?
could they not have been undersealing?