I could bunk you could bunk he could bunk we could bunk you could bunk they could bunk
V-ing form
I could be bunking you could be bunking he could be bunking we could be bunking you could be bunking they could be bunking
Perfect
I could have bunked you could have bunked he could have bunked we could have bunked you could have bunked they could have bunked
V-ing perfect
I could have been bunking you could have been bunking he could have been bunking we could have been bunking you could have been bunking they could have been bunking
Negation
Simple form
I could not bunk you could not bunk he could not bunk we could not bunk you could not bunk they could not bunk
V-ing form
I could not be bunking you could not be bunking he could not be bunking we could not be bunking you could not be bunking they could not be bunking
Perfect
I could not have bunked you could not have bunked he could not have bunked we could not have bunked you could not have bunked they could not have bunked
V-ing perfect
I could not have been bunking you could not have been bunking he could not have been bunking we could not have been bunking you could not have been bunking they could not have been bunking
Interrogative form
Simple form
could I bunk? could you bunk? could he bunk? could we bunk? could you bunk? could they bunk?
V-ing form
could I be bunking? could you be bunking? could he be bunking? could we be bunking? could you be bunking? could they be bunking?
Perfect
could I have bunked? could you have bunked? could he have bunked? could we have bunked? could you have bunked? could they have bunked?
V-ing perfect
could I have been bunking? could you have been bunking? could he have been bunking? could we have been bunking? could you have been bunking? could they have been bunking?
Interro-negative form
Simple form
could I not bunk? could you not bunk? could he not bunk? could we not bunk? could you not bunk? could they not bunk?
V-ing form
could I not be bunking? could you not be bunking? could he not be bunking? could we not be bunking? could you not be bunking? could they not be bunking?
Perfect
could I not have bunked? could you not have bunked? could he not have bunked? could we not have bunked? could you not have bunked? could they not have bunked?
V-ing perfect
could I not have been bunking? could you not have been bunking? could he not have been bunking? could we not have been bunking? could you not have been bunking? could they not have been bunking?