English verb conjugation
COULD CONE

Regular verb: cone - coned - coned

Affirmation

Simple form	V-ing form
I could cone you could cone she could cone we could cone you could cone they could cone	I could be coning you could be coning she could be coning we could be coning you could be coning they could be coning
Perfect	V-ing perfect
I could have coned you could have coned she could have coned we could have coned you could have coned they could have coned	I could have been coning you could have been coning she could have been coning we could have been coning you could have been coning they could have been coning

Negation

Simple form	V-ing form
I could not cone you could not cone she could not cone we could not cone you could not cone they could not cone	I could not be coning you could not be coning she could not be coning we could not be coning you could not be coning they could not be coning
Perfect	V-ing perfect
I could not have coned you could not have coned she could not have coned we could not have coned you could not have coned they could not have coned	I could not have been coning you could not have been coning she could not have been coning we could not have been coning you could not have been coning they could not have been coning

Interrogative form

Simple form	V-ing form
could I cone? could you cone? could she cone? could we cone? could you cone? could they cone?	could I be coning? could you be coning? could she be coning? could we be coning? could you be coning? could they be coning?
Perfect	V-ing perfect
could I have coned? could you have coned? could she have coned? could we have coned? could you have coned? could they have coned?	could I have been coning? could you have been coning? could she have been coning? could we have been coning? could you have been coning? could they have been coning?

Interro-negative form

Simple form	V-ing form
could I not cone? could you not cone? could she not cone? could we not cone? could you not cone? could they not cone?	could I not be coning? could you not be coning? could she not be coning? could we not be coning? could you not be coning? could they not be coning?
Perfect	V-ing perfect
could I not have coned? could you not have coned? could she not have coned? could we not have coned? could you not have coned? could they not have coned?	could I not have been coning? could you not have been coning? could she not have been coning? could we not have been coning? could you not have been coning? could they not have been coning?