I could bald you could bald she could bald we could bald you could bald they could bald
V-ing form
I could be balding you could be balding she could be balding we could be balding you could be balding they could be balding
Perfect
I could have balded you could have balded she could have balded we could have balded you could have balded they could have balded
V-ing perfect
I could have been balding you could have been balding she could have been balding we could have been balding you could have been balding they could have been balding
Negation
Simple form
I could not bald you could not bald she could not bald we could not bald you could not bald they could not bald
V-ing form
I could not be balding you could not be balding she could not be balding we could not be balding you could not be balding they could not be balding
Perfect
I could not have balded you could not have balded she could not have balded we could not have balded you could not have balded they could not have balded
V-ing perfect
I could not have been balding you could not have been balding she could not have been balding we could not have been balding you could not have been balding they could not have been balding
Interrogative form
Simple form
could I bald? could you bald? could she bald? could we bald? could you bald? could they bald?
V-ing form
could I be balding? could you be balding? could she be balding? could we be balding? could you be balding? could they be balding?
Perfect
could I have balded? could you have balded? could she have balded? could we have balded? could you have balded? could they have balded?
V-ing perfect
could I have been balding? could you have been balding? could she have been balding? could we have been balding? could you have been balding? could they have been balding?
Interro-negative form
Simple form
could I not bald? could you not bald? could she not bald? could we not bald? could you not bald? could they not bald?
V-ing form
could I not be balding? could you not be balding? could she not be balding? could we not be balding? could you not be balding? could they not be balding?
Perfect
could I not have balded? could you not have balded? could she not have balded? could we not have balded? could you not have balded? could they not have balded?
V-ing perfect
could I not have been balding? could you not have been balding? could she not have been balding? could we not have been balding? could you not have been balding? could they not have been balding?