must dematerialize
Regular verb: dematerialize - dematerialized- dematerialized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must dematerialize
you must dematerialize
he must dematerialize
we must dematerialize
you must dematerialize
they must dematerialize 	I must be dematerializing
you must be dematerializing
he must be dematerializing
we must be dematerializing
you must be dematerializing
they must be dematerializing	I must have dematerialized
you must have dematerialized
he must have dematerialized
we must have dematerialized
you must have dematerialized
they must have dematerialized	I must have been dematerializing
you must have been dematerializing
he must have been dematerializing
we must have been dematerializing
you must have been dematerializing
they must have been dematerializing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't dematerialize
you mustn't dematerialize
he mustn't dematerialize
we mustn't dematerialize
you mustn't dematerialize
they mustn't dematerialize 	I mustn't be dematerializing
you mustn't be dematerializing
he mustn't be dematerializing
we mustn't be dematerializing
you mustn't be dematerializing
they mustn't be dematerializing	I mustn't have dematerialized
you mustn't have dematerialized
he mustn't have dematerialized
we mustn't have dematerialized
you mustn't have dematerialized
they mustn't have dematerialized	I mustn't have been dematerializing
you mustn't have been dematerializing
he mustn't have been dematerializing
we mustn't have been dematerializing
you mustn't have been dematerializing
they mustn't have been dematerializing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I dematerialize?
must you dematerialize?
must he dematerialize?
must we dematerialize?
must you dematerialize?
must they dematerialize? 	must I be dematerializing?
must you be dematerializing?
must he be dematerializing?
must we be dematerializing?
must you be dematerializing?
must they be dematerializing? 	must I have dematerialized?
must you have dematerialized?
must he have dematerialized?
must we have dematerialized?
must you have dematerialized?
must they have dematerialized? 	must I have been dematerializing?
must you have been dematerializing?
must he have been dematerializing?
must we have been dematerializing?
must you have been dematerializing?
must they have been dematerializing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I dematerialize?
mustn't you dematerialize?
mustn't he dematerialize?
mustn't we dematerialize?
mustn't you dematerialize?
mustn't they dematerialize? 	mustn't I be dematerializing?
mustn't you be dematerializing?
mustn't he be dematerializing?
mustn't we be dematerializing?
mustn't you be dematerializing?
mustn't they be dematerializing? 	mustn't I have dematerialized?
mustn't you have dematerialized?
mustn't he have dematerialized?
mustn't we have dematerialized?
mustn't you have dematerialized?
mustn't they have dematerialized? 	mustn't I have been dematerializing?
mustn't you have been dematerializing?
mustn't he have been dematerializing?
mustn't we have been dematerializing?
mustn't you have been dematerializing?
mustn't they have been dematerializing?