I could bald you could bald he could bald we could bald you could bald they could bald
V-ing form
I could be balding you could be balding he could be balding we could be balding you could be balding they could be balding
Perfect
I could have balded you could have balded he 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 he could have been balding we could have been balding you could have been balding they could have been balding
Negation
Simple form
I couldn't bald you couldn't bald he couldn't bald we couldn't bald you couldn't bald they couldn't bald
V-ing form
I couldn't be balding you couldn't be balding he couldn't be balding we couldn't be balding you couldn't be balding they couldn't be balding
Perfect
I couldn't have balded you couldn't have balded he couldn't have balded we couldn't have balded you couldn't have balded they couldn't have balded
V-ing perfect
I couldn't have been balding you couldn't have been balding he couldn't have been balding we couldn't have been balding you couldn't have been balding they couldn't have been balding
Interrogative form
Simple form
could I bald? could you bald? could he bald? could we bald? could you bald? could they bald?
V-ing form
could I be balding? could you be balding? could he be balding? could we be balding? could you be balding? could they be balding?
Perfect
could I have balded? could you have balded? could he 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 he have been balding? could we have been balding? could you have been balding? could they have been balding?
Interro-negative form
Simple form
couldn't I bald? couldn't you bald? couldn't he bald? couldn't we bald? couldn't you bald? couldn't they bald?
V-ing form
couldn't I be balding? couldn't you be balding? couldn't he be balding? couldn't we be balding? couldn't you be balding? couldn't they be balding?
Perfect
couldn't I have balded? couldn't you have balded? couldn't he have balded? couldn't we have balded? couldn't you have balded? couldn't they have balded?
V-ing perfect
couldn't I have been balding? couldn't you have been balding? couldn't he have been balding? couldn't we have been balding? couldn't you have been balding? couldn't they have been balding?