I could function you could function she could function we could function you could function they could function
Forma com V-ing
I could be functioning you could be functioning she could be functioning we could be functioning you could be functioning they could be functioning
Perfeito
I could have functioned you could have functioned she could have functioned we could have functioned you could have functioned they could have functioned
Perfeito com V-ing
I could have been functioning you could have been functioning she could have been functioning we could have been functioning you could have been functioning they could have been functioning
Negação
Forma simple
I could not function you could not function she could not function we could not function you could not function they could not function
Forma com V-ing
I could not be functioning you could not be functioning she could not be functioning we could not be functioning you could not be functioning they could not be functioning
Perfeito
I could not have functioned you could not have functioned she could not have functioned we could not have functioned you could not have functioned they could not have functioned
Perfeito com V-ing
I could not have been functioning you could not have been functioning she could not have been functioning we could not have been functioning you could not have been functioning they could not have been functioning
Forma interrogativa
Forma simple
could I function? could you function? could she function? could we function? could you function? could they function?
Forma com V-ing
could I be functioning? could you be functioning? could she be functioning? could we be functioning? could you be functioning? could they be functioning?
Perfeito
could I have functioned? could you have functioned? could she have functioned? could we have functioned? could you have functioned? could they have functioned?
Perfeito com V-ing
could I have been functioning? could you have been functioning? could she have been functioning? could we have been functioning? could you have been functioning? could they have been functioning?
Forma interro-Negação
Forma simple
could I not function? could you not function? could she not function? could we not function? could you not function? could they not function?
Forma com V-ing
could I not be functioning? could you not be functioning? could she not be functioning? could we not be functioning? could you not be functioning? could they not be functioning?
Perfeito
could I not have functioned? could you not have functioned? could she not have functioned? could we not have functioned? could you not have functioned? could they not have functioned?
Perfeito com V-ing
could I not have been functioning? could you not have been functioning? could she not have been functioning? could we not have been functioning? could you not have been functioning? could they not have been functioning?