could undergo
Verbo irregular: undergo - underwent- undergone

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could undergo
you could undergo
she could undergo
we could undergo
you could undergo
they could undergo 	I could be undergoing
you could be undergoing
she could be undergoing
we could be undergoing
you could be undergoing
they could be undergoing	I could have undergone
you could have undergone
she could have undergone
we could have undergone
you could have undergone
they could have undergone	I could have been undergoing
you could have been undergoing
she could have been undergoing
we could have been undergoing
you could have been undergoing
they could have been undergoing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not undergo
you could not undergo
she could not undergo
we could not undergo
you could not undergo
they could not undergo 	I could not be undergoing
you could not be undergoing
she could not be undergoing
we could not be undergoing
you could not be undergoing
they could not be undergoing	I could not have undergone
you could not have undergone
she could not have undergone
we could not have undergone
you could not have undergone
they could not have undergone	I could not have been undergoing
you could not have been undergoing
she could not have been undergoing
we could not have been undergoing
you could not have been undergoing
they could not have been undergoing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I undergo?
could you undergo?
could she undergo?
could we undergo?
could you undergo?
could they undergo? 	could I be undergoing?
could you be undergoing?
could she be undergoing?
could we be undergoing?
could you be undergoing?
could they be undergoing? 	could I have undergone?
could you have undergone?
could she have undergone?
could we have undergone?
could you have undergone?
could they have undergone? 	could I have been undergoing?
could you have been undergoing?
could she have been undergoing?
could we have been undergoing?
could you have been undergoing?
could they have been undergoing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not undergo?
could you not undergo?
could she not undergo?
could we not undergo?
could you not undergo?
could they not undergo? 	could I not be undergoing?
could you not be undergoing?
could she not be undergoing?
could we not be undergoing?
could you not be undergoing?
could they not be undergoing? 	could I not have undergone?
could you not have undergone?
could she not have undergone?
could we not have undergone?
could you not have undergone?
could they not have undergone? 	could I not have been undergoing?
could you not have been undergoing?
could she not have been undergoing?
could we not have been undergoing?
could you not have been undergoing?
could they not have been undergoing?