I could bout you could bout he could bout we could bout you could bout they could bout
V-ing form
I could be bouting you could be bouting he could be bouting we could be bouting you could be bouting they could be bouting
Perfect
I could have bouted you could have bouted he 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 he 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 he 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 he 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 he 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 he 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 he bout? could we bout? could you bout? could they bout?
V-ing form
could I be bouting? could you be bouting? could he be bouting? could we be bouting? could you be bouting? could they be bouting?
Perfect
could I have bouted? could you have bouted? could he 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 he 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 he 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 he 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 he 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 he not have been bouting? could we not have been bouting? could you not have been bouting? could they not have been bouting?