I could maintain you could maintain she could maintain we could maintain you could maintain they could maintain
Forme en V-ing
I could be maintaining you could be maintaining she could be maintaining we could be maintaining you could be maintaining they could be maintaining
Perfect
I could have maintained you could have maintained she could have maintained we could have maintained you could have maintained they could have maintained
Perfect en V-ing
I could have been maintaining you could have been maintaining she could have been maintaining we could have been maintaining you could have been maintaining they could have been maintaining
Négation
Forme simple
I couldn't maintain you couldn't maintain she couldn't maintain we couldn't maintain you couldn't maintain they couldn't maintain
Forme en V-ing
I couldn't be maintaining you couldn't be maintaining she couldn't be maintaining we couldn't be maintaining you couldn't be maintaining they couldn't be maintaining
Perfect
I couldn't have maintained you couldn't have maintained she couldn't have maintained we couldn't have maintained you couldn't have maintained they couldn't have maintained
Perfect en V-ing
I couldn't have been maintaining you couldn't have been maintaining she couldn't have been maintaining we couldn't have been maintaining you couldn't have been maintaining they couldn't have been maintaining
Forme interrogative
Forme simple
could I maintain? could you maintain? could she maintain? could we maintain? could you maintain? could they maintain?
Forme en V-ing
could I be maintaining? could you be maintaining? could she be maintaining? could we be maintaining? could you be maintaining? could they be maintaining?
Perfect
could I have maintained? could you have maintained? could she have maintained? could we have maintained? could you have maintained? could they have maintained?
Perfect en V-ing
could I have been maintaining? could you have been maintaining? could she have been maintaining? could we have been maintaining? could you have been maintaining? could they have been maintaining?
Forme interro-négative
Forme simple
couldn't I maintain? couldn't you maintain? couldn't she maintain? couldn't we maintain? couldn't you maintain? couldn't they maintain?
Forme en V-ing
couldn't I be maintaining? couldn't you be maintaining? couldn't she be maintaining? couldn't we be maintaining? couldn't you be maintaining? couldn't they be maintaining?
Perfect
couldn't I have maintained? couldn't you have maintained? couldn't she have maintained? couldn't we have maintained? couldn't you have maintained? couldn't they have maintained?
Perfect en V-ing
couldn't I have been maintaining? couldn't you have been maintaining? couldn't she have been maintaining? couldn't we have been maintaining? couldn't you have been maintaining? couldn't they have been maintaining?