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