I must decontaminate you must decontaminate she must decontaminate we must decontaminate you must decontaminate they must decontaminate
V-ing form
I must be decontaminating you must be decontaminating she must be decontaminating we must be decontaminating you must be decontaminating they must be decontaminating
Perfect
I must have decontaminated you must have decontaminated she must have decontaminated we must have decontaminated you must have decontaminated they must have decontaminated
V-ing perfect
I must have been decontaminating you must have been decontaminating she must have been decontaminating we must have been decontaminating you must have been decontaminating they must have been decontaminating
Negation
Simple form
I must not decontaminate you must not decontaminate she must not decontaminate we must not decontaminate you must not decontaminate they must not decontaminate
V-ing form
I must not be decontaminating you must not be decontaminating she must not be decontaminating we must not be decontaminating you must not be decontaminating they must not be decontaminating
Perfect
I must not have decontaminated you must not have decontaminated she must not have decontaminated we must not have decontaminated you must not have decontaminated they must not have decontaminated
V-ing perfect
I must not have been decontaminating you must not have been decontaminating she must not have been decontaminating we must not have been decontaminating you must not have been decontaminating they must not have been decontaminating
Interrogative form
Simple form
must I decontaminate? must you decontaminate? must she decontaminate? must we decontaminate? must you decontaminate? must they decontaminate?
V-ing form
must I be decontaminating? must you be decontaminating? must she be decontaminating? must we be decontaminating? must you be decontaminating? must they be decontaminating?
Perfect
must I have decontaminated? must you have decontaminated? must she have decontaminated? must we have decontaminated? must you have decontaminated? must they have decontaminated?
V-ing perfect
must I have been decontaminating? must you have been decontaminating? must she have been decontaminating? must we have been decontaminating? must you have been decontaminating? must they have been decontaminating?
Interro-negative form
Simple form
must I not decontaminate? must you not decontaminate? must she not decontaminate? must we not decontaminate? must you not decontaminate? must they not decontaminate?
V-ing form
must I not be decontaminating? must you not be decontaminating? must she not be decontaminating? must we not be decontaminating? must you not be decontaminating? must they not be decontaminating?
Perfect
must I not have decontaminated? must you not have decontaminated? must she not have decontaminated? must we not have decontaminated? must you not have decontaminated? must they not have decontaminated?
V-ing perfect
must I not have been decontaminating? must you not have been decontaminating? must she not have been decontaminating? must we not have been decontaminating? must you not have been decontaminating? must they not have been decontaminating?