I could supplement you could supplement she could supplement we could supplement you could supplement they could supplement
Forme en V-ing
I could be supplementing you could be supplementing she could be supplementing we could be supplementing you could be supplementing they could be supplementing
Perfect
I could have supplemented you could have supplemented she could have supplemented we could have supplemented you could have supplemented they could have supplemented
Perfect en V-ing
I could have been supplementing you could have been supplementing she could have been supplementing we could have been supplementing you could have been supplementing they could have been supplementing
Négation
Forme simple
I could not supplement you could not supplement she could not supplement we could not supplement you could not supplement they could not supplement
Forme en V-ing
I could not be supplementing you could not be supplementing she could not be supplementing we could not be supplementing you could not be supplementing they could not be supplementing
Perfect
I could not have supplemented you could not have supplemented she could not have supplemented we could not have supplemented you could not have supplemented they could not have supplemented
Perfect en V-ing
I could not have been supplementing you could not have been supplementing she could not have been supplementing we could not have been supplementing you could not have been supplementing they could not have been supplementing
Forme interrogative
Forme simple
could I supplement? could you supplement? could she supplement? could we supplement? could you supplement? could they supplement?
Forme en V-ing
could I be supplementing? could you be supplementing? could she be supplementing? could we be supplementing? could you be supplementing? could they be supplementing?
Perfect
could I have supplemented? could you have supplemented? could she have supplemented? could we have supplemented? could you have supplemented? could they have supplemented?
Perfect en V-ing
could I have been supplementing? could you have been supplementing? could she have been supplementing? could we have been supplementing? could you have been supplementing? could they have been supplementing?
Forme interro-négative
Forme simple
could I not supplement? could you not supplement? could she not supplement? could we not supplement? could you not supplement? could they not supplement?
Forme en V-ing
could I not be supplementing? could you not be supplementing? could she not be supplementing? could we not be supplementing? could you not be supplementing? could they not be supplementing?
Perfect
could I not have supplemented? could you not have supplemented? could she not have supplemented? could we not have supplemented? could you not have supplemented? could they not have supplemented?
Perfect en V-ing
could I not have been supplementing? could you not have been supplementing? could she not have been supplementing? could we not have been supplementing? could you not have been supplementing? could they not have been supplementing?