could confirm
Verbo regular: confirm - confirmed- confirmed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could confirm
you could confirm
she could confirm
we could confirm
you could confirm
they could confirm 	I could be confirming
you could be confirming
she could be confirming
we could be confirming
you could be confirming
they could be confirming	I could have confirmed
you could have confirmed
she could have confirmed
we could have confirmed
you could have confirmed
they could have confirmed	I could have been confirming
you could have been confirming
she could have been confirming
we could have been confirming
you could have been confirming
they could have been confirming	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not confirm
you could not confirm
she could not confirm
we could not confirm
you could not confirm
they could not confirm 	I could not be confirming
you could not be confirming
she could not be confirming
we could not be confirming
you could not be confirming
they could not be confirming	I could not have confirmed
you could not have confirmed
she could not have confirmed
we could not have confirmed
you could not have confirmed
they could not have confirmed	I could not have been confirming
you could not have been confirming
she could not have been confirming
we could not have been confirming
you could not have been confirming
they could not have been confirming	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I confirm?
could you confirm?
could she confirm?
could we confirm?
could you confirm?
could they confirm? 	could I be confirming?
could you be confirming?
could she be confirming?
could we be confirming?
could you be confirming?
could they be confirming? 	could I have confirmed?
could you have confirmed?
could she have confirmed?
could we have confirmed?
could you have confirmed?
could they have confirmed? 	could I have been confirming?
could you have been confirming?
could she have been confirming?
could we have been confirming?
could you have been confirming?
could they have been confirming? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not confirm?
could you not confirm?
could she not confirm?
could we not confirm?
could you not confirm?
could they not confirm? 	could I not be confirming?
could you not be confirming?
could she not be confirming?
could we not be confirming?
could you not be confirming?
could they not be confirming? 	could I not have confirmed?
could you not have confirmed?
could she not have confirmed?
could we not have confirmed?
could you not have confirmed?
could they not have confirmed? 	could I not have been confirming?
could you not have been confirming?
could she not have been confirming?
could we not have been confirming?
could you not have been confirming?
could they not have been confirming?