I could assert you could assert he could assert we could assert you could assert they could assert
Forma com V-ing
I could be asserting you could be asserting he could be asserting we could be asserting you could be asserting they could be asserting
Perfeito
I could have asserted you could have asserted he could have asserted we could have asserted you could have asserted they could have asserted
Perfeito com V-ing
I could have been asserting you could have been asserting he could have been asserting we could have been asserting you could have been asserting they could have been asserting
Negação
Forma simple
I could not assert you could not assert he could not assert we could not assert you could not assert they could not assert
Forma com V-ing
I could not be asserting you could not be asserting he could not be asserting we could not be asserting you could not be asserting they could not be asserting
Perfeito
I could not have asserted you could not have asserted he could not have asserted we could not have asserted you could not have asserted they could not have asserted
Perfeito com V-ing
I could not have been asserting you could not have been asserting he could not have been asserting we could not have been asserting you could not have been asserting they could not have been asserting
Forma interrogativa
Forma simple
could I assert? could you assert? could he assert? could we assert? could you assert? could they assert?
Forma com V-ing
could I be asserting? could you be asserting? could he be asserting? could we be asserting? could you be asserting? could they be asserting?
Perfeito
could I have asserted? could you have asserted? could he have asserted? could we have asserted? could you have asserted? could they have asserted?
Perfeito com V-ing
could I have been asserting? could you have been asserting? could he have been asserting? could we have been asserting? could you have been asserting? could they have been asserting?
Forma interro-Negação
Forma simple
could I not assert? could you not assert? could he not assert? could we not assert? could you not assert? could they not assert?
Forma com V-ing
could I not be asserting? could you not be asserting? could he not be asserting? could we not be asserting? could you not be asserting? could they not be asserting?
Perfeito
could I not have asserted? could you not have asserted? could he not have asserted? could we not have asserted? could you not have asserted? could they not have asserted?
Perfeito com V-ing
could I not have been asserting? could you not have been asserting? could he not have been asserting? could we not have been asserting? could you not have been asserting? could they not have been asserting?