I must decontaminate you must decontaminate he must decontaminate we must decontaminate you must decontaminate they must decontaminate
V-ing form
I must be decontaminating you must be decontaminating he must be decontaminating we must be decontaminating you must be decontaminating they must be decontaminating
Perfect
I must have decontaminated you must have decontaminated he 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 he must have been decontaminating we must have been decontaminating you must have been decontaminating they must have been decontaminating
Negation
Simple form
I mustn't decontaminate you mustn't decontaminate he mustn't decontaminate we mustn't decontaminate you mustn't decontaminate they mustn't decontaminate
V-ing form
I mustn't be decontaminating you mustn't be decontaminating he mustn't be decontaminating we mustn't be decontaminating you mustn't be decontaminating they mustn't be decontaminating
Perfect
I mustn't have decontaminated you mustn't have decontaminated he mustn't have decontaminated we mustn't have decontaminated you mustn't have decontaminated they mustn't have decontaminated
V-ing perfect
I mustn't have been decontaminating you mustn't have been decontaminating he mustn't have been decontaminating we mustn't have been decontaminating you mustn't have been decontaminating they mustn't have been decontaminating
Interrogative form
Simple form
must I decontaminate? must you decontaminate? must he decontaminate? must we decontaminate? must you decontaminate? must they decontaminate?
V-ing form
must I be decontaminating? must you be decontaminating? must he be decontaminating? must we be decontaminating? must you be decontaminating? must they be decontaminating?
Perfect
must I have decontaminated? must you have decontaminated? must he 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 he have been decontaminating? must we have been decontaminating? must you have been decontaminating? must they have been decontaminating?
Interro-negative form
Simple form
mustn't I decontaminate? mustn't you decontaminate? mustn't he decontaminate? mustn't we decontaminate? mustn't you decontaminate? mustn't they decontaminate?
V-ing form
mustn't I be decontaminating? mustn't you be decontaminating? mustn't he be decontaminating? mustn't we be decontaminating? mustn't you be decontaminating? mustn't they be decontaminating?
Perfect
mustn't I have decontaminated? mustn't you have decontaminated? mustn't he have decontaminated? mustn't we have decontaminated? mustn't you have decontaminated? mustn't they have decontaminated?
V-ing perfect
mustn't I have been decontaminating? mustn't you have been decontaminating? mustn't he have been decontaminating? mustn't we have been decontaminating? mustn't you have been decontaminating? mustn't they have been decontaminating?