Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could bidd you could bidd he could bidd we could bidd you could bidd they could bidd
V-ing form
I could be bidding you could be bidding he could be bidding we could be bidding you could be bidding they could be bidding
Perfect
I could have bidded you could have bidded he could have bidded we could have bidded you could have bidded they could have bidded
V-ing perfect
I could have been bidding you could have been bidding he could have been bidding we could have been bidding you could have been bidding they could have been bidding
Negation
Simple form
I couldn't bidd you couldn't bidd he couldn't bidd we couldn't bidd you couldn't bidd they couldn't bidd
V-ing form
I couldn't be bidding you couldn't be bidding he couldn't be bidding we couldn't be bidding you couldn't be bidding they couldn't be bidding
Perfect
I couldn't have bidded you couldn't have bidded he couldn't have bidded we couldn't have bidded you couldn't have bidded they couldn't have bidded
V-ing perfect
I couldn't have been bidding you couldn't have been bidding he couldn't have been bidding we couldn't have been bidding you couldn't have been bidding they couldn't have been bidding
Interrogative form
Simple form
could I bidd? could you bidd? could he bidd? could we bidd? could you bidd? could they bidd?
V-ing form
could I be bidding? could you be bidding? could he be bidding? could we be bidding? could you be bidding? could they be bidding?
Perfect
could I have bidded? could you have bidded? could he have bidded? could we have bidded? could you have bidded? could they have bidded?
V-ing perfect
could I have been bidding? could you have been bidding? could he have been bidding? could we have been bidding? could you have been bidding? could they have been bidding?
Interro-negative form
Simple form
couldn't I bidd? couldn't you bidd? couldn't he bidd? couldn't we bidd? couldn't you bidd? couldn't they bidd?
V-ing form
couldn't I be bidding? couldn't you be bidding? couldn't he be bidding? couldn't we be bidding? couldn't you be bidding? couldn't they be bidding?
Perfect
couldn't I have bidded? couldn't you have bidded? couldn't he have bidded? couldn't we have bidded? couldn't you have bidded? couldn't they have bidded?
V-ing perfect
couldn't I have been bidding? couldn't you have been bidding? couldn't he have been bidding? couldn't we have been bidding? couldn't you have been bidding? couldn't they have been bidding?