English verb conjugation
COULD BID

Irregular verb: bid - bid, bade - bid, bidden

Affirmation

Simple form	V-ing form
I could bid you could bid he could bid we could bid you could bid they could bid	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	V-ing perfect
I could have bid, bidden you could have bid, bidden he could have bid, bidden we could have bid, bidden you could have bid, bidden they could have bid, bidden	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	V-ing form
I couldn't bid you couldn't bid he couldn't bid we couldn't bid you couldn't bid they couldn't bid	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	V-ing perfect
I couldn't have bid, bidden you couldn't have bid, bidden he couldn't have bid, bidden we couldn't have bid, bidden you couldn't have bid, bidden they couldn't have bid, bidden	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	V-ing form
could I bid? could you bid? could he bid? could we bid? could you bid? could they bid?	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	V-ing perfect
could I have bid, bidden? could you have bid, bidden? could he have bid, bidden? could we have bid, bidden? could you have bid, bidden? could they have bid, bidden?	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	V-ing form
couldn't I bid? couldn't you bid? couldn't he bid? couldn't we bid? couldn't you bid? couldn't they bid?	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	V-ing perfect
couldn't I have bid, bidden? couldn't you have bid, bidden? couldn't he have bid, bidden? couldn't we have bid, bidden? couldn't you have bid, bidden? couldn't they have bid, bidden?	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?