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