must unionize
Regular verb: unionize - unionized- unionized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unionize
you must unionize
he must unionize
we must unionize
you must unionize
they must unionize 	I must be unionizing
you must be unionizing
he must be unionizing
we must be unionizing
you must be unionizing
they must be unionizing	I must have unionized
you must have unionized
he must have unionized
we must have unionized
you must have unionized
they must have unionized	I must have been unionizing
you must have been unionizing
he must have been unionizing
we must have been unionizing
you must have been unionizing
they must have been unionizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unionize
you mustn't unionize
he mustn't unionize
we mustn't unionize
you mustn't unionize
they mustn't unionize 	I mustn't be unionizing
you mustn't be unionizing
he mustn't be unionizing
we mustn't be unionizing
you mustn't be unionizing
they mustn't be unionizing	I mustn't have unionized
you mustn't have unionized
he mustn't have unionized
we mustn't have unionized
you mustn't have unionized
they mustn't have unionized	I mustn't have been unionizing
you mustn't have been unionizing
he mustn't have been unionizing
we mustn't have been unionizing
you mustn't have been unionizing
they mustn't have been unionizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unionize?
must you unionize?
must he unionize?
must we unionize?
must you unionize?
must they unionize? 	must I be unionizing?
must you be unionizing?
must he be unionizing?
must we be unionizing?
must you be unionizing?
must they be unionizing? 	must I have unionized?
must you have unionized?
must he have unionized?
must we have unionized?
must you have unionized?
must they have unionized? 	must I have been unionizing?
must you have been unionizing?
must he have been unionizing?
must we have been unionizing?
must you have been unionizing?
must they have been unionizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unionize?
mustn't you unionize?
mustn't he unionize?
mustn't we unionize?
mustn't you unionize?
mustn't they unionize? 	mustn't I be unionizing?
mustn't you be unionizing?
mustn't he be unionizing?
mustn't we be unionizing?
mustn't you be unionizing?
mustn't they be unionizing? 	mustn't I have unionized?
mustn't you have unionized?
mustn't he have unionized?
mustn't we have unionized?
mustn't you have unionized?
mustn't they have unionized? 	mustn't I have been unionizing?
mustn't you have been unionizing?
mustn't he have been unionizing?
mustn't we have been unionizing?
mustn't you have been unionizing?
mustn't they have been unionizing?