I could conceal you could conceal she could conceal we could conceal you could conceal they could conceal
Forma com V-ing
I could be concealing you could be concealing she could be concealing we could be concealing you could be concealing they could be concealing
Perfeito
I could have concealed you could have concealed she could have concealed we could have concealed you could have concealed they could have concealed
Perfeito com V-ing
I could have been concealing you could have been concealing she could have been concealing we could have been concealing you could have been concealing they could have been concealing
Negação
Forma simple
I could not conceal you could not conceal she could not conceal we could not conceal you could not conceal they could not conceal
Forma com V-ing
I could not be concealing you could not be concealing she could not be concealing we could not be concealing you could not be concealing they could not be concealing
Perfeito
I could not have concealed you could not have concealed she could not have concealed we could not have concealed you could not have concealed they could not have concealed
Perfeito com V-ing
I could not have been concealing you could not have been concealing she could not have been concealing we could not have been concealing you could not have been concealing they could not have been concealing
Forma interrogativa
Forma simple
could I conceal? could you conceal? could she conceal? could we conceal? could you conceal? could they conceal?
Forma com V-ing
could I be concealing? could you be concealing? could she be concealing? could we be concealing? could you be concealing? could they be concealing?
Perfeito
could I have concealed? could you have concealed? could she have concealed? could we have concealed? could you have concealed? could they have concealed?
Perfeito com V-ing
could I have been concealing? could you have been concealing? could she have been concealing? could we have been concealing? could you have been concealing? could they have been concealing?
Forma interro-Negação
Forma simple
could I not conceal? could you not conceal? could she not conceal? could we not conceal? could you not conceal? could they not conceal?
Forma com V-ing
could I not be concealing? could you not be concealing? could she not be concealing? could we not be concealing? could you not be concealing? could they not be concealing?
Perfeito
could I not have concealed? could you not have concealed? could she not have concealed? could we not have concealed? could you not have concealed? could they not have concealed?
Perfeito com V-ing
could I not have been concealing? could you not have been concealing? could she not have been concealing? could we not have been concealing? could you not have been concealing? could they not have been concealing?