could vial
Verbo regular: vial - vialed- vialed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could vial
you could vial
he could vial
we could vial
you could vial
they could vial 	I could be vialing
you could be vialing
he could be vialing
we could be vialing
you could be vialing
they could be vialing	I could have vialed
you could have vialed
he could have vialed
we could have vialed
you could have vialed
they could have vialed	I could have been vialing
you could have been vialing
he could have been vialing
we could have been vialing
you could have been vialing
they could have been vialing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not vial
you could not vial
he could not vial
we could not vial
you could not vial
they could not vial 	I could not be vialing
you could not be vialing
he could not be vialing
we could not be vialing
you could not be vialing
they could not be vialing	I could not have vialed
you could not have vialed
he could not have vialed
we could not have vialed
you could not have vialed
they could not have vialed	I could not have been vialing
you could not have been vialing
he could not have been vialing
we could not have been vialing
you could not have been vialing
they could not have been vialing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I vial?
could you vial?
could he vial?
could we vial?
could you vial?
could they vial? 	could I be vialing?
could you be vialing?
could he be vialing?
could we be vialing?
could you be vialing?
could they be vialing? 	could I have vialed?
could you have vialed?
could he have vialed?
could we have vialed?
could you have vialed?
could they have vialed? 	could I have been vialing?
could you have been vialing?
could he have been vialing?
could we have been vialing?
could you have been vialing?
could they have been vialing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not vial?
could you not vial?
could he not vial?
could we not vial?
could you not vial?
could they not vial? 	could I not be vialing?
could you not be vialing?
could he not be vialing?
could we not be vialing?
could you not be vialing?
could they not be vialing? 	could I not have vialed?
could you not have vialed?
could he not have vialed?
could we not have vialed?
could you not have vialed?
could they not have vialed? 	could I not have been vialing?
could you not have been vialing?
could he not have been vialing?
could we not have been vialing?
could you not have been vialing?
could they not have been vialing?