I could marginate you could marginate he could marginate we could marginate you could marginate they could marginate
V-ing form
I could be marginating you could be marginating he could be marginating we could be marginating you could be marginating they could be marginating
Perfect
I could have marginated you could have marginated he could have marginated we could have marginated you could have marginated they could have marginated
V-ing perfect
I could have been marginating you could have been marginating he could have been marginating we could have been marginating you could have been marginating they could have been marginating
Negation
Simple form
I could not marginate you could not marginate he could not marginate we could not marginate you could not marginate they could not marginate
V-ing form
I could not be marginating you could not be marginating he could not be marginating we could not be marginating you could not be marginating they could not be marginating
Perfect
I could not have marginated you could not have marginated he could not have marginated we could not have marginated you could not have marginated they could not have marginated
V-ing perfect
I could not have been marginating you could not have been marginating he could not have been marginating we could not have been marginating you could not have been marginating they could not have been marginating
Interrogative form
Simple form
could I marginate? could you marginate? could he marginate? could we marginate? could you marginate? could they marginate?
V-ing form
could I be marginating? could you be marginating? could he be marginating? could we be marginating? could you be marginating? could they be marginating?
Perfect
could I have marginated? could you have marginated? could he have marginated? could we have marginated? could you have marginated? could they have marginated?
V-ing perfect
could I have been marginating? could you have been marginating? could he have been marginating? could we have been marginating? could you have been marginating? could they have been marginating?
Interro-negative form
Simple form
could I not marginate? could you not marginate? could he not marginate? could we not marginate? could you not marginate? could they not marginate?
V-ing form
could I not be marginating? could you not be marginating? could he not be marginating? could we not be marginating? could you not be marginating? could they not be marginating?
Perfect
could I not have marginated? could you not have marginated? could he not have marginated? could we not have marginated? could you not have marginated? could they not have marginated?
V-ing perfect
could I not have been marginating? could you not have been marginating? could he not have been marginating? could we not have been marginating? could you not have been marginating? could they not have been marginating?