English verb conjugation
COULD CONE

Regular verb: cone - coned - coned

Affirmation

Simple form	V-ing form
I could cone you could cone he could cone we could cone you could cone they could cone	I could be coning you could be coning he 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 he 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 he 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 couldn't cone you couldn't cone he couldn't cone we couldn't cone you couldn't cone they couldn't cone	I couldn't be coning you couldn't be coning he couldn't be coning we couldn't be coning you couldn't be coning they couldn't be coning
Perfect	V-ing perfect
I couldn't have coned you couldn't have coned he couldn't have coned we couldn't have coned you couldn't have coned they couldn't have coned	I couldn't have been coning you couldn't have been coning he couldn't have been coning we couldn't have been coning you couldn't have been coning they couldn't have been coning

Interrogative form

Simple form	V-ing form
could I cone? could you cone? could he cone? could we cone? could you cone? could they cone?	could I be coning? could you be coning? could he 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 he 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 he 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
couldn't I cone? couldn't you cone? couldn't he cone? couldn't we cone? couldn't you cone? couldn't they cone?	couldn't I be coning? couldn't you be coning? couldn't he be coning? couldn't we be coning? couldn't you be coning? couldn't they be coning?
Perfect	V-ing perfect
couldn't I have coned? couldn't you have coned? couldn't he have coned? couldn't we have coned? couldn't you have coned? couldn't they have coned?	couldn't I have been coning? couldn't you have been coning? couldn't he have been coning? couldn't we have been coning? couldn't you have been coning? couldn't they have been coning?