I could leaf you could leaf he could leaf we could leaf you could leaf they could leaf
Forma con 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
Perfecto
I could have leafed you could have leafed he could have leafed we could have leafed you could have leafed they could have leafed
Perfecto con 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
Negación
Forma 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
Forma con 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
Perfecto
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
Perfecto con 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
Forma interrogativa
Forma simple
could I leaf? could you leaf? could he leaf? could we leaf? could you leaf? could they leaf?
Forma con 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?
Perfecto
could I have leafed? could you have leafed? could he have leafed? could we have leafed? could you have leafed? could they have leafed?
Perfecto con 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?
Forma interro-negativa
Forma 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?
Forma con 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?
Perfecto
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?
Perfecto con 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?