could confirm
Verbo regular: confirm - confirmed- confirmed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't confirm
you couldn't confirm
she couldn't confirm
we couldn't confirm
you couldn't confirm
they couldn't confirm 	I couldn't be confirming
you couldn't be confirming
she couldn't be confirming
we couldn't be confirming
you couldn't be confirming
they couldn't be confirming	I couldn't have confirmed
you couldn't have confirmed
she couldn't have confirmed
we couldn't have confirmed
you couldn't have confirmed
they couldn't have confirmed	I couldn't have been confirming
you couldn't have been confirming
she couldn't have been confirming
we couldn't have been confirming
you couldn't have been confirming
they couldn't have been confirming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I confirm?
couldn't you confirm?
couldn't she confirm?
couldn't we confirm?
couldn't you confirm?
couldn't they confirm? 	couldn't I be confirming?
couldn't you be confirming?
couldn't she be confirming?
couldn't we be confirming?
couldn't you be confirming?
couldn't they be confirming? 	couldn't I have confirmed?
couldn't you have confirmed?
couldn't she have confirmed?
couldn't we have confirmed?
couldn't you have confirmed?
couldn't they have confirmed? 	couldn't I have been confirming?
couldn't you have been confirming?
couldn't she have been confirming?
couldn't we have been confirming?
couldn't you have been confirming?
couldn't they have been confirming?