I could discuss you could discuss he could discuss we could discuss you could discuss they could discuss
Forma com V-ing
I could be discussing you could be discussing he could be discussing we could be discussing you could be discussing they could be discussing
Perfeito
I could have discussed you could have discussed he could have discussed we could have discussed you could have discussed they could have discussed
Perfeito com V-ing
I could have been discussing you could have been discussing he could have been discussing we could have been discussing you could have been discussing they could have been discussing
Negação
Forma simple
I couldn't discuss you couldn't discuss he couldn't discuss we couldn't discuss you couldn't discuss they couldn't discuss
Forma com V-ing
I couldn't be discussing you couldn't be discussing he couldn't be discussing we couldn't be discussing you couldn't be discussing they couldn't be discussing
Perfeito
I couldn't have discussed you couldn't have discussed he couldn't have discussed we couldn't have discussed you couldn't have discussed they couldn't have discussed
Perfeito com V-ing
I couldn't have been discussing you couldn't have been discussing he couldn't have been discussing we couldn't have been discussing you couldn't have been discussing they couldn't have been discussing
Forma interrogativa
Forma simple
could I discuss? could you discuss? could he discuss? could we discuss? could you discuss? could they discuss?
Forma com V-ing
could I be discussing? could you be discussing? could he be discussing? could we be discussing? could you be discussing? could they be discussing?
Perfeito
could I have discussed? could you have discussed? could he have discussed? could we have discussed? could you have discussed? could they have discussed?
Perfeito com V-ing
could I have been discussing? could you have been discussing? could he have been discussing? could we have been discussing? could you have been discussing? could they have been discussing?
Forma interro-Negação
Forma simple
couldn't I discuss? couldn't you discuss? couldn't he discuss? couldn't we discuss? couldn't you discuss? couldn't they discuss?
Forma com V-ing
couldn't I be discussing? couldn't you be discussing? couldn't he be discussing? couldn't we be discussing? couldn't you be discussing? couldn't they be discussing?
Perfeito
couldn't I have discussed? couldn't you have discussed? couldn't he have discussed? couldn't we have discussed? couldn't you have discussed? couldn't they have discussed?
Perfeito com V-ing
couldn't I have been discussing? couldn't you have been discussing? couldn't he have been discussing? couldn't we have been discussing? couldn't you have been discussing? couldn't they have been discussing?