English verb conjugation
MUST VAULT

Regular verb: vault - vaulted - vaulted

Affirmation

Simple form	V-ing form
I must vault you must vault he must vault we must vault you must vault they must vault	I must be vaulting you must be vaulting he must be vaulting we must be vaulting you must be vaulting they must be vaulting
Perfect	V-ing perfect
I must have vaulted you must have vaulted he must have vaulted we must have vaulted you must have vaulted they must have vaulted	I must have been vaulting you must have been vaulting he must have been vaulting we must have been vaulting you must have been vaulting they must have been vaulting

Negation

Simple form	V-ing form
I mustn't vault you mustn't vault he mustn't vault we mustn't vault you mustn't vault they mustn't vault	I mustn't be vaulting you mustn't be vaulting he mustn't be vaulting we mustn't be vaulting you mustn't be vaulting they mustn't be vaulting
Perfect	V-ing perfect
I mustn't have vaulted you mustn't have vaulted he mustn't have vaulted we mustn't have vaulted you mustn't have vaulted they mustn't have vaulted	I mustn't have been vaulting you mustn't have been vaulting he mustn't have been vaulting we mustn't have been vaulting you mustn't have been vaulting they mustn't have been vaulting

Interrogative form

Simple form	V-ing form
must I vault? must you vault? must he vault? must we vault? must you vault? must they vault?	must I be vaulting? must you be vaulting? must he be vaulting? must we be vaulting? must you be vaulting? must they be vaulting?
Perfect	V-ing perfect
must I have vaulted? must you have vaulted? must he have vaulted? must we have vaulted? must you have vaulted? must they have vaulted?	must I have been vaulting? must you have been vaulting? must he have been vaulting? must we have been vaulting? must you have been vaulting? must they have been vaulting?

Interro-negative form

Simple form	V-ing form
mustn't I vault? mustn't you vault? mustn't he vault? mustn't we vault? mustn't you vault? mustn't they vault?	mustn't I be vaulting? mustn't you be vaulting? mustn't he be vaulting? mustn't we be vaulting? mustn't you be vaulting? mustn't they be vaulting?
Perfect	V-ing perfect
mustn't I have vaulted? mustn't you have vaulted? mustn't he have vaulted? mustn't we have vaulted? mustn't you have vaulted? mustn't they have vaulted?	mustn't I have been vaulting? mustn't you have been vaulting? mustn't he have been vaulting? mustn't we have been vaulting? mustn't you have been vaulting? mustn't they have been vaulting?