I could leaf you could leaf he could leaf we could leaf you could leaf they could leaf
Forme en V-ing
I could be leafing you could be leafing he could be leafing we could be leafing you could be leafing they could be leafing
Perfect
I could have leafed you could have leafed he could have leafed we could have leafed you could have leafed they could have leafed
Perfect en V-ing
I could have been leafing you could have been leafing he could have been leafing we could have been leafing you could have been leafing they could have been leafing
Négation
Forme simple
I couldn't leaf you couldn't leaf he couldn't leaf we couldn't leaf you couldn't leaf they couldn't leaf
Forme en V-ing
I couldn't be leafing you couldn't be leafing he couldn't be leafing we couldn't be leafing you couldn't be leafing they couldn't be leafing
Perfect
I couldn't have leafed you couldn't have leafed he couldn't have leafed we couldn't have leafed you couldn't have leafed they couldn't have leafed
Perfect en V-ing
I couldn't have been leafing you couldn't have been leafing he couldn't have been leafing we couldn't have been leafing you couldn't have been leafing they couldn't have been leafing
Forme interrogative
Forme simple
could I leaf? could you leaf? could he leaf? could we leaf? could you leaf? could they leaf?
Forme en V-ing
could I be leafing? could you be leafing? could he be leafing? could we be leafing? could you be leafing? could they be leafing?
Perfect
could I have leafed? could you have leafed? could he have leafed? could we have leafed? could you have leafed? could they have leafed?
Perfect en V-ing
could I have been leafing? could you have been leafing? could he have been leafing? could we have been leafing? could you have been leafing? could they have been leafing?
Forme interro-négative
Forme simple
couldn't I leaf? couldn't you leaf? couldn't he leaf? couldn't we leaf? couldn't you leaf? couldn't they leaf?
Forme en V-ing
couldn't I be leafing? couldn't you be leafing? couldn't he be leafing? couldn't we be leafing? couldn't you be leafing? couldn't they be leafing?
Perfect
couldn't I have leafed? couldn't you have leafed? couldn't he have leafed? couldn't we have leafed? couldn't you have leafed? couldn't they have leafed?
Perfect en V-ing
couldn't I have been leafing? couldn't you have been leafing? couldn't he have been leafing? couldn't we have been leafing? couldn't you have been leafing? couldn't they have been leafing?