English verb conjugation
COULD DISPROVE

Regular verb: disprove - disproved - disproved

Affirmation

Simple form	V-ing form
I could disprove you could disprove he could disprove we could disprove you could disprove they could disprove	I could be disproving you could be disproving he could be disproving we could be disproving you could be disproving they could be disproving
Perfect	V-ing perfect
I could have disproved you could have disproved he could have disproved we could have disproved you could have disproved they could have disproved	I could have been disproving you could have been disproving he could have been disproving we could have been disproving you could have been disproving they could have been disproving

Negation

Simple form	V-ing form
I couldn't disprove you couldn't disprove he couldn't disprove we couldn't disprove you couldn't disprove they couldn't disprove	I couldn't be disproving you couldn't be disproving he couldn't be disproving we couldn't be disproving you couldn't be disproving they couldn't be disproving
Perfect	V-ing perfect
I couldn't have disproved you couldn't have disproved he couldn't have disproved we couldn't have disproved you couldn't have disproved they couldn't have disproved	I couldn't have been disproving you couldn't have been disproving he couldn't have been disproving we couldn't have been disproving you couldn't have been disproving they couldn't have been disproving

Interrogative form

Simple form	V-ing form
could I disprove? could you disprove? could he disprove? could we disprove? could you disprove? could they disprove?	could I be disproving? could you be disproving? could he be disproving? could we be disproving? could you be disproving? could they be disproving?
Perfect	V-ing perfect
could I have disproved? could you have disproved? could he have disproved? could we have disproved? could you have disproved? could they have disproved?	could I have been disproving? could you have been disproving? could he have been disproving? could we have been disproving? could you have been disproving? could they have been disproving?

Interro-negative form

Simple form	V-ing form
couldn't I disprove? couldn't you disprove? couldn't he disprove? couldn't we disprove? couldn't you disprove? couldn't they disprove?	couldn't I be disproving? couldn't you be disproving? couldn't he be disproving? couldn't we be disproving? couldn't you be disproving? couldn't they be disproving?
Perfect	V-ing perfect
couldn't I have disproved? couldn't you have disproved? couldn't he have disproved? couldn't we have disproved? couldn't you have disproved? couldn't they have disproved?	couldn't I have been disproving? couldn't you have been disproving? couldn't he have been disproving? couldn't we have been disproving? couldn't you have been disproving? couldn't they have been disproving?