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 must not devitalize
you must not devitalize
he must not devitalize
we must not devitalize
you must not devitalize
they must not devitalize 	I must not be devitalizing
you must not be devitalizing
he must not be devitalizing
we must not be devitalizing
you must not be devitalizing
they must not be devitalizing	I must not have devitalized
you must not have devitalized
he must not have devitalized
we must not have devitalized
you must not have devitalized
they must not have devitalized	I must not have been devitalizing
you must not have been devitalizing
he must not have been devitalizing
we must not have been devitalizing
you must not have been devitalizing
they must not 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 	
must I not devitalize?
must you not devitalize?
must he not devitalize?
must we not devitalize?
must you not devitalize?
must they not devitalize? 	must I not be devitalizing?
must you not be devitalizing?
must he not be devitalizing?
must we not be devitalizing?
must you not be devitalizing?
must they not be devitalizing? 	must I not have devitalized?
must you not have devitalized?
must he not have devitalized?
must we not have devitalized?
must you not have devitalized?
must they not have devitalized? 	must I not have been devitalizing?
must you not have been devitalizing?
must he not have been devitalizing?
must we not have been devitalizing?
must you not have been devitalizing?
must they not have been devitalizing?