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