English verb conjugation
MUST DUB

Regular verb: dub - dubbed - dubbed

Affirmation

Simple form	V-ing form
I must dub you must dub he must dub we must dub you must dub they must dub	I must be dubbing you must be dubbing he must be dubbing we must be dubbing you must be dubbing they must be dubbing
Perfect	V-ing perfect
I must have dubbed you must have dubbed he must have dubbed we must have dubbed you must have dubbed they must have dubbed	I must have been dubbing you must have been dubbing he must have been dubbing we must have been dubbing you must have been dubbing they must have been dubbing

Negation

Simple form	V-ing form
I mustn't dub you mustn't dub he mustn't dub we mustn't dub you mustn't dub they mustn't dub	I mustn't be dubbing you mustn't be dubbing he mustn't be dubbing we mustn't be dubbing you mustn't be dubbing they mustn't be dubbing
Perfect	V-ing perfect
I mustn't have dubbed you mustn't have dubbed he mustn't have dubbed we mustn't have dubbed you mustn't have dubbed they mustn't have dubbed	I mustn't have been dubbing you mustn't have been dubbing he mustn't have been dubbing we mustn't have been dubbing you mustn't have been dubbing they mustn't have been dubbing

Interrogative form

Simple form	V-ing form
must I dub? must you dub? must he dub? must we dub? must you dub? must they dub?	must I be dubbing? must you be dubbing? must he be dubbing? must we be dubbing? must you be dubbing? must they be dubbing?
Perfect	V-ing perfect
must I have dubbed? must you have dubbed? must he have dubbed? must we have dubbed? must you have dubbed? must they have dubbed?	must I have been dubbing? must you have been dubbing? must he have been dubbing? must we have been dubbing? must you have been dubbing? must they have been dubbing?

Interro-negative form

Simple form	V-ing form
mustn't I dub? mustn't you dub? mustn't he dub? mustn't we dub? mustn't you dub? mustn't they dub?	mustn't I be dubbing? mustn't you be dubbing? mustn't he be dubbing? mustn't we be dubbing? mustn't you be dubbing? mustn't they be dubbing?
Perfect	V-ing perfect
mustn't I have dubbed? mustn't you have dubbed? mustn't he have dubbed? mustn't we have dubbed? mustn't you have dubbed? mustn't they have dubbed?	mustn't I have been dubbing? mustn't you have been dubbing? mustn't he have been dubbing? mustn't we have been dubbing? mustn't you have been dubbing? mustn't they have been dubbing?