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