must devitalize
Regular verb: devitalize - devitalized- devitalized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must devitalize
you must devitalize
he must devitalize
we must devitalize
you must devitalize
they must devitalize 	I must be devitalizing
you must be devitalizing
he must be devitalizing
we must be devitalizing
you must be devitalizing
they must be devitalizing	I must have devitalized
you must have devitalized
he must have devitalized
we must have devitalized
you must have devitalized
they must have devitalized	I must have been devitalizing
you must have been devitalizing
he must have been devitalizing
we must have been devitalizing
you must have been devitalizing
they must have been devitalizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't devitalize
you mustn't devitalize
he mustn't devitalize
we mustn't devitalize
you mustn't devitalize
they mustn't devitalize 	I mustn't be devitalizing
you mustn't be devitalizing
he mustn't be devitalizing
we mustn't be devitalizing
you mustn't be devitalizing
they mustn't be devitalizing	I mustn't have devitalized
you mustn't have devitalized
he mustn't have devitalized
we mustn't have devitalized
you mustn't have devitalized
they mustn't have devitalized	I mustn't have been devitalizing
you mustn't have been devitalizing
he mustn't have been devitalizing
we mustn't have been devitalizing
you mustn't have been devitalizing
they mustn't have been devitalizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I devitalize?
must you devitalize?
must he devitalize?
must we devitalize?
must you devitalize?
must they devitalize? 	must I be devitalizing?
must you be devitalizing?
must he be devitalizing?
must we be devitalizing?
must you be devitalizing?
must they be devitalizing? 	must I have devitalized?
must you have devitalized?
must he have devitalized?
must we have devitalized?
must you have devitalized?
must they have devitalized? 	must I have been devitalizing?
must you have been devitalizing?
must he have been devitalizing?
must we have been devitalizing?
must you have been devitalizing?
must they have been devitalizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I devitalize?
mustn't you devitalize?
mustn't he devitalize?
mustn't we devitalize?
mustn't you devitalize?
mustn't they devitalize? 	mustn't I be devitalizing?
mustn't you be devitalizing?
mustn't he be devitalizing?
mustn't we be devitalizing?
mustn't you be devitalizing?
mustn't they be devitalizing? 	mustn't I have devitalized?
mustn't you have devitalized?
mustn't he have devitalized?
mustn't we have devitalized?
mustn't you have devitalized?
mustn't they have devitalized? 	mustn't I have been devitalizing?
mustn't you have been devitalizing?
mustn't he have been devitalizing?
mustn't we have been devitalizing?
mustn't you have been devitalizing?
mustn't they have been devitalizing?