I could bout you could bout she could bout we could bout you could bout they could bout
V-ing form
I could be bouting you could be bouting she could be bouting we could be bouting you could be bouting they could be bouting
Perfect
I could have bouted you could have bouted she could have bouted we could have bouted you could have bouted they could have bouted
V-ing perfect
I could have been bouting you could have been bouting she could have been bouting we could have been bouting you could have been bouting they could have been bouting
Negation
Simple form
I could not bout you could not bout she could not bout we could not bout you could not bout they could not bout
V-ing form
I could not be bouting you could not be bouting she could not be bouting we could not be bouting you could not be bouting they could not be bouting
Perfect
I could not have bouted you could not have bouted she could not have bouted we could not have bouted you could not have bouted they could not have bouted
V-ing perfect
I could not have been bouting you could not have been bouting she could not have been bouting we could not have been bouting you could not have been bouting they could not have been bouting
Interrogative form
Simple form
could I bout? could you bout? could she bout? could we bout? could you bout? could they bout?
V-ing form
could I be bouting? could you be bouting? could she be bouting? could we be bouting? could you be bouting? could they be bouting?
Perfect
could I have bouted? could you have bouted? could she have bouted? could we have bouted? could you have bouted? could they have bouted?
V-ing perfect
could I have been bouting? could you have been bouting? could she have been bouting? could we have been bouting? could you have been bouting? could they have been bouting?
Interro-negative form
Simple form
could I not bout? could you not bout? could she not bout? could we not bout? could you not bout? could they not bout?
V-ing form
could I not be bouting? could you not be bouting? could she not be bouting? could we not be bouting? could you not be bouting? could they not be bouting?
Perfect
could I not have bouted? could you not have bouted? could she not have bouted? could we not have bouted? could you not have bouted? could they not have bouted?
V-ing perfect
could I not have been bouting? could you not have been bouting? could she not have been bouting? could we not have been bouting? could you not have been bouting? could they not have been bouting?