English verb conjugation
COULD BID

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

Affirmation

Simple form	V-ing form
I could bid you could bid she could bid we could bid you could bid they could bid	I could be bidding you could be bidding she 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 she 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 she 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 she 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 she 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 she 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 she 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 she bid? could we bid? could you bid? could they bid?	could I be bidding? could you be bidding? could she 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 she 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 she 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 she 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 she 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 she 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 she have been bidding? couldn't we have been bidding? couldn't you have been bidding? couldn't they have been bidding?