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 couldn't bout you couldn't bout she couldn't bout we couldn't bout you couldn't bout they couldn't bout
V-ing form
I couldn't be bouting you couldn't be bouting she couldn't be bouting we couldn't be bouting you couldn't be bouting they couldn't be bouting
Perfect
I couldn't have bouted you couldn't have bouted she couldn't have bouted we couldn't have bouted you couldn't have bouted they couldn't have bouted
V-ing perfect
I couldn't have been bouting you couldn't have been bouting she couldn't have been bouting we couldn't have been bouting you couldn't have been bouting they couldn't 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
couldn't I bout? couldn't you bout? couldn't she bout? couldn't we bout? couldn't you bout? couldn't they bout?
V-ing form
couldn't I be bouting? couldn't you be bouting? couldn't she be bouting? couldn't we be bouting? couldn't you be bouting? couldn't they be bouting?
Perfect
couldn't I have bouted? couldn't you have bouted? couldn't she have bouted? couldn't we have bouted? couldn't you have bouted? couldn't they have bouted?
V-ing perfect
couldn't I have been bouting? couldn't you have been bouting? couldn't she have been bouting? couldn't we have been bouting? couldn't you have been bouting? couldn't they have been bouting?