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