English verb conjugation
OUGHT TO DISPROVE

Regular verb: disprove - disproved - disproved

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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