I must devitrify you must devitrify he must devitrify we must devitrify you must devitrify they must devitrify
Forme en V-ing
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
I must have devitrified you must have devitrified he must have devitrified we must have devitrified you must have devitrified they must have devitrified
Perfect en V-ing
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
Négation
Forme simple
I must not devitrify you must not devitrify he must not devitrify we must not devitrify you must not devitrify they must not devitrify
Forme en V-ing
I must not be devitrifying you must not be devitrifying he must not be devitrifying we must not be devitrifying you must not be devitrifying they must not be devitrifying
Perfect
I must not have devitrified you must not have devitrified he must not have devitrified we must not have devitrified you must not have devitrified they must not have devitrified
Perfect en V-ing
I must not have been devitrifying you must not have been devitrifying he must not have been devitrifying we must not have been devitrifying you must not have been devitrifying they must not have been devitrifying
Forme interrogative
Forme simple
must I devitrify? must you devitrify? must he devitrify? must we devitrify? must you devitrify? must they devitrify?
Forme en V-ing
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
must I have devitrified? must you have devitrified? must he have devitrified? must we have devitrified? must you have devitrified? must they have devitrified?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
must I not devitrify? must you not devitrify? must he not devitrify? must we not devitrify? must you not devitrify? must they not devitrify?
Forme en V-ing
must I not be devitrifying? must you not be devitrifying? must he not be devitrifying? must we not be devitrifying? must you not be devitrifying? must they not be devitrifying?
Perfect
must I not have devitrified? must you not have devitrified? must he not have devitrified? must we not have devitrified? must you not have devitrified? must they not have devitrified?
Perfect en V-ing
must I not have been devitrifying? must you not have been devitrifying? must he not have been devitrifying? must we not have been devitrifying? must you not have been devitrifying? must they not have been devitrifying?