English verb conjugation
MUST VACATION

Regular verb: vacation - vacationed - vacationed

Affirmation

Simple form	V-ing form
I must vacation you must vacation he must vacation we must vacation you must vacation they must vacation	I must be vacationing you must be vacationing he must be vacationing we must be vacationing you must be vacationing they must be vacationing
Perfect	V-ing perfect
I must have vacationed you must have vacationed he must have vacationed we must have vacationed you must have vacationed they must have vacationed	I must have been vacationing you must have been vacationing he must have been vacationing we must have been vacationing you must have been vacationing they must have been vacationing

Negation

Simple form	V-ing form
I mustn't vacation you mustn't vacation he mustn't vacation we mustn't vacation you mustn't vacation they mustn't vacation	I mustn't be vacationing you mustn't be vacationing he mustn't be vacationing we mustn't be vacationing you mustn't be vacationing they mustn't be vacationing
Perfect	V-ing perfect
I mustn't have vacationed you mustn't have vacationed he mustn't have vacationed we mustn't have vacationed you mustn't have vacationed they mustn't have vacationed	I mustn't have been vacationing you mustn't have been vacationing he mustn't have been vacationing we mustn't have been vacationing you mustn't have been vacationing they mustn't have been vacationing

Interrogative form

Simple form	V-ing form
must I vacation? must you vacation? must he vacation? must we vacation? must you vacation? must they vacation?	must I be vacationing? must you be vacationing? must he be vacationing? must we be vacationing? must you be vacationing? must they be vacationing?
Perfect	V-ing perfect
must I have vacationed? must you have vacationed? must he have vacationed? must we have vacationed? must you have vacationed? must they have vacationed?	must I have been vacationing? must you have been vacationing? must he have been vacationing? must we have been vacationing? must you have been vacationing? must they have been vacationing?

Interro-negative form

Simple form	V-ing form
mustn't I vacation? mustn't you vacation? mustn't he vacation? mustn't we vacation? mustn't you vacation? mustn't they vacation?	mustn't I be vacationing? mustn't you be vacationing? mustn't he be vacationing? mustn't we be vacationing? mustn't you be vacationing? mustn't they be vacationing?
Perfect	V-ing perfect
mustn't I have vacationed? mustn't you have vacationed? mustn't he have vacationed? mustn't we have vacationed? mustn't you have vacationed? mustn't they have vacationed?	mustn't I have been vacationing? mustn't you have been vacationing? mustn't he have been vacationing? mustn't we have been vacationing? mustn't you have been vacationing? mustn't they have been vacationing?