English verb conjugation
MUST DEVITRIFY

Regular verb: devitrify - devitrified - devitrified

Affirmation

Simple form	V-ing form
I must devitrify you must devitrify he must devitrify we must devitrify you must devitrify they must devitrify	I must be devitrifying you must be devitrifying he must be devitrifying we must be devitrifying you must be devitrifying they must be devitrifying
Perfect	V-ing perfect
I must have devitrified you must have devitrified he must have devitrified we must have devitrified you must have devitrified they must have devitrified	I must have been devitrifying you must have been devitrifying he must have been devitrifying we must have been devitrifying you must have been devitrifying they must have been devitrifying

Negation

Simple form	V-ing form
I mustn't devitrify you mustn't devitrify he mustn't devitrify we mustn't devitrify you mustn't devitrify they mustn't devitrify	I mustn't be devitrifying you mustn't be devitrifying he mustn't be devitrifying we mustn't be devitrifying you mustn't be devitrifying they mustn't be devitrifying
Perfect	V-ing perfect
I mustn't have devitrified you mustn't have devitrified he mustn't have devitrified we mustn't have devitrified you mustn't have devitrified they mustn't have devitrified	I mustn't have been devitrifying you mustn't have been devitrifying he mustn't have been devitrifying we mustn't have been devitrifying you mustn't have been devitrifying they mustn't have been devitrifying

Interrogative form

Simple form	V-ing form
must I devitrify? must you devitrify? must he devitrify? must we devitrify? must you devitrify? must they devitrify?	must I be devitrifying? must you be devitrifying? must he be devitrifying? must we be devitrifying? must you be devitrifying? must they be devitrifying?
Perfect	V-ing perfect
must I have devitrified? must you have devitrified? must he have devitrified? must we have devitrified? must you have devitrified? must they have devitrified?	must I have been devitrifying? must you have been devitrifying? must he have been devitrifying? must we have been devitrifying? must you have been devitrifying? must they have been devitrifying?

Interro-negative form

Simple form	V-ing form
mustn't I devitrify? mustn't you devitrify? mustn't he devitrify? mustn't we devitrify? mustn't you devitrify? mustn't they devitrify?	mustn't I be devitrifying? mustn't you be devitrifying? mustn't he be devitrifying? mustn't we be devitrifying? mustn't you be devitrifying? mustn't they be devitrifying?
Perfect	V-ing perfect
mustn't I have devitrified? mustn't you have devitrified? mustn't he have devitrified? mustn't we have devitrified? mustn't you have devitrified? mustn't they have devitrified?	mustn't I have been devitrifying? mustn't you have been devitrifying? mustn't he have been devitrifying? mustn't we have been devitrifying? mustn't you have been devitrifying? mustn't they have been devitrifying?