English verb conjugation
COULD BICKER

Regular verb: bicker - bickered - bickered

Affirmation

Simple form	V-ing form
I could bicker you could bicker he could bicker we could bicker you could bicker they could bicker	I could be bickering you could be bickering he could be bickering we could be bickering you could be bickering they could be bickering
Perfect	V-ing perfect
I could have bickered you could have bickered he could have bickered we could have bickered you could have bickered they could have bickered	I could have been bickering you could have been bickering he could have been bickering we could have been bickering you could have been bickering they could have been bickering

Negation

Simple form	V-ing form
I couldn't bicker you couldn't bicker he couldn't bicker we couldn't bicker you couldn't bicker they couldn't bicker	I couldn't be bickering you couldn't be bickering he couldn't be bickering we couldn't be bickering you couldn't be bickering they couldn't be bickering
Perfect	V-ing perfect
I couldn't have bickered you couldn't have bickered he couldn't have bickered we couldn't have bickered you couldn't have bickered they couldn't have bickered	I couldn't have been bickering you couldn't have been bickering he couldn't have been bickering we couldn't have been bickering you couldn't have been bickering they couldn't have been bickering

Interrogative form

Simple form	V-ing form
could I bicker? could you bicker? could he bicker? could we bicker? could you bicker? could they bicker?	could I be bickering? could you be bickering? could he be bickering? could we be bickering? could you be bickering? could they be bickering?
Perfect	V-ing perfect
could I have bickered? could you have bickered? could he have bickered? could we have bickered? could you have bickered? could they have bickered?	could I have been bickering? could you have been bickering? could he have been bickering? could we have been bickering? could you have been bickering? could they have been bickering?

Interro-negative form

Simple form	V-ing form
couldn't I bicker? couldn't you bicker? couldn't he bicker? couldn't we bicker? couldn't you bicker? couldn't they bicker?	couldn't I be bickering? couldn't you be bickering? couldn't he be bickering? couldn't we be bickering? couldn't you be bickering? couldn't they be bickering?
Perfect	V-ing perfect
couldn't I have bickered? couldn't you have bickered? couldn't he have bickered? couldn't we have bickered? couldn't you have bickered? couldn't they have bickered?	couldn't I have been bickering? couldn't you have been bickering? couldn't he have been bickering? couldn't we have been bickering? couldn't you have been bickering? couldn't they have been bickering?