English verb conjugation
MUST DISPROVE

Regular verb: disprove - disproved - disproved

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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