I must deform you must deform he must deform we must deform you must deform they must deform
V-ing form
I must be deforming you must be deforming he must be deforming we must be deforming you must be deforming they must be deforming
Perfect
I must have deformed you must have deformed he must have deformed we must have deformed you must have deformed they must have deformed
V-ing perfect
I must have been deforming you must have been deforming he must have been deforming we must have been deforming you must have been deforming they must have been deforming
Negation
Simple form
I must not deform you must not deform he must not deform we must not deform you must not deform they must not deform
V-ing form
I must not be deforming you must not be deforming he must not be deforming we must not be deforming you must not be deforming they must not be deforming
Perfect
I must not have deformed you must not have deformed he must not have deformed we must not have deformed you must not have deformed they must not have deformed
V-ing perfect
I must not have been deforming you must not have been deforming he must not have been deforming we must not have been deforming you must not have been deforming they must not have been deforming
Interrogative form
Simple form
must I deform? must you deform? must he deform? must we deform? must you deform? must they deform?
V-ing form
must I be deforming? must you be deforming? must he be deforming? must we be deforming? must you be deforming? must they be deforming?
Perfect
must I have deformed? must you have deformed? must he have deformed? must we have deformed? must you have deformed? must they have deformed?
V-ing perfect
must I have been deforming? must you have been deforming? must he have been deforming? must we have been deforming? must you have been deforming? must they have been deforming?
Interro-negative form
Simple form
must I not deform? must you not deform? must he not deform? must we not deform? must you not deform? must they not deform?
V-ing form
must I not be deforming? must you not be deforming? must he not be deforming? must we not be deforming? must you not be deforming? must they not be deforming?
Perfect
must I not have deformed? must you not have deformed? must he not have deformed? must we not have deformed? must you not have deformed? must they not have deformed?
V-ing perfect
must I not have been deforming? must you not have been deforming? must he not have been deforming? must we not have been deforming? must you not have been deforming? must they not have been deforming?