I could lot you could lot he could lot we could lot you could lot they could lot
V-ing form
I could be lotting you could be lotting he could be lotting we could be lotting you could be lotting they could be lotting
Perfect
I could have lotted you could have lotted he could have lotted we could have lotted you could have lotted they could have lotted
V-ing perfect
I could have been lotting you could have been lotting he could have been lotting we could have been lotting you could have been lotting they could have been lotting
Negation
Simple form
I couldn't lot you couldn't lot he couldn't lot we couldn't lot you couldn't lot they couldn't lot
V-ing form
I couldn't be lotting you couldn't be lotting he couldn't be lotting we couldn't be lotting you couldn't be lotting they couldn't be lotting
Perfect
I couldn't have lotted you couldn't have lotted he couldn't have lotted we couldn't have lotted you couldn't have lotted they couldn't have lotted
V-ing perfect
I couldn't have been lotting you couldn't have been lotting he couldn't have been lotting we couldn't have been lotting you couldn't have been lotting they couldn't have been lotting
Interrogative form
Simple form
could I lot? could you lot? could he lot? could we lot? could you lot? could they lot?
V-ing form
could I be lotting? could you be lotting? could he be lotting? could we be lotting? could you be lotting? could they be lotting?
Perfect
could I have lotted? could you have lotted? could he have lotted? could we have lotted? could you have lotted? could they have lotted?
V-ing perfect
could I have been lotting? could you have been lotting? could he have been lotting? could we have been lotting? could you have been lotting? could they have been lotting?
Interro-negative form
Simple form
couldn't I lot? couldn't you lot? couldn't he lot? couldn't we lot? couldn't you lot? couldn't they lot?
V-ing form
couldn't I be lotting? couldn't you be lotting? couldn't he be lotting? couldn't we be lotting? couldn't you be lotting? couldn't they be lotting?
Perfect
couldn't I have lotted? couldn't you have lotted? couldn't he have lotted? couldn't we have lotted? couldn't you have lotted? couldn't they have lotted?
V-ing perfect
couldn't I have been lotting? couldn't you have been lotting? couldn't he have been lotting? couldn't we have been lotting? couldn't you have been lotting? couldn't they have been lotting?