I could descend you could descend he could descend we could descend you could descend they could descend
Forma con V-ing
I could be descending you could be descending he could be descending we could be descending you could be descending they could be descending
Perfecto
I could have descended you could have descended he could have descended we could have descended you could have descended they could have descended
Perfecto con V-ing
I could have been descending you could have been descending he could have been descending we could have been descending you could have been descending they could have been descending
Negación
Forma simple
I couldn't descend you couldn't descend he couldn't descend we couldn't descend you couldn't descend they couldn't descend
Forma con V-ing
I couldn't be descending you couldn't be descending he couldn't be descending we couldn't be descending you couldn't be descending they couldn't be descending
Perfecto
I couldn't have descended you couldn't have descended he couldn't have descended we couldn't have descended you couldn't have descended they couldn't have descended
Perfecto con V-ing
I couldn't have been descending you couldn't have been descending he couldn't have been descending we couldn't have been descending you couldn't have been descending they couldn't have been descending
Forma interrogativa
Forma simple
could I descend? could you descend? could he descend? could we descend? could you descend? could they descend?
Forma con V-ing
could I be descending? could you be descending? could he be descending? could we be descending? could you be descending? could they be descending?
Perfecto
could I have descended? could you have descended? could he have descended? could we have descended? could you have descended? could they have descended?
Perfecto con V-ing
could I have been descending? could you have been descending? could he have been descending? could we have been descending? could you have been descending? could they have been descending?
Forma interro-negativa
Forma simple
couldn't I descend? couldn't you descend? couldn't he descend? couldn't we descend? couldn't you descend? couldn't they descend?
Forma con V-ing
couldn't I be descending? couldn't you be descending? couldn't he be descending? couldn't we be descending? couldn't you be descending? couldn't they be descending?
Perfecto
couldn't I have descended? couldn't you have descended? couldn't he have descended? couldn't we have descended? couldn't you have descended? couldn't they have descended?
Perfecto con V-ing
couldn't I have been descending? couldn't you have been descending? couldn't he have been descending? couldn't we have been descending? couldn't you have been descending? couldn't they have been descending?