I could dispute you could dispute she could dispute we could dispute you could dispute they could dispute
V-ing form
I could be disputing you could be disputing she could be disputing we could be disputing you could be disputing they could be disputing
Perfect
I could have disputed you could have disputed she could have disputed we could have disputed you could have disputed they could have disputed
V-ing perfect
I could have been disputing you could have been disputing she could have been disputing we could have been disputing you could have been disputing they could have been disputing
Negation
Simple form
I could not dispute you could not dispute she could not dispute we could not dispute you could not dispute they could not dispute
V-ing form
I could not be disputing you could not be disputing she could not be disputing we could not be disputing you could not be disputing they could not be disputing
Perfect
I could not have disputed you could not have disputed she could not have disputed we could not have disputed you could not have disputed they could not have disputed
V-ing perfect
I could not have been disputing you could not have been disputing she could not have been disputing we could not have been disputing you could not have been disputing they could not have been disputing
Interrogative form
Simple form
could I dispute? could you dispute? could she dispute? could we dispute? could you dispute? could they dispute?
V-ing form
could I be disputing? could you be disputing? could she be disputing? could we be disputing? could you be disputing? could they be disputing?
Perfect
could I have disputed? could you have disputed? could she have disputed? could we have disputed? could you have disputed? could they have disputed?
V-ing perfect
could I have been disputing? could you have been disputing? could she have been disputing? could we have been disputing? could you have been disputing? could they have been disputing?
Interro-negative form
Simple form
could I not dispute? could you not dispute? could she not dispute? could we not dispute? could you not dispute? could they not dispute?
V-ing form
could I not be disputing? could you not be disputing? could she not be disputing? could we not be disputing? could you not be disputing? could they not be disputing?
Perfect
could I not have disputed? could you not have disputed? could she not have disputed? could we not have disputed? could you not have disputed? could they not have disputed?
V-ing perfect
could I not have been disputing? could you not have been disputing? could she not have been disputing? could we not have been disputing? could you not have been disputing? could they not have been disputing?