I must age you must age she must age we must age you must age they must age
V-ing form
I must be aging you must be aging she must be aging we must be aging you must be aging they must be aging
Perfect
I must have aged you must have aged she must have aged we must have aged you must have aged they must have aged
V-ing perfect
I must have been aging you must have been aging she must have been aging we must have been aging you must have been aging they must have been aging
Negation
Simple form
I mustn't age you mustn't age she mustn't age we mustn't age you mustn't age they mustn't age
V-ing form
I mustn't be aging you mustn't be aging she mustn't be aging we mustn't be aging you mustn't be aging they mustn't be aging
Perfect
I mustn't have aged you mustn't have aged she mustn't have aged we mustn't have aged you mustn't have aged they mustn't have aged
V-ing perfect
I mustn't have been aging you mustn't have been aging she mustn't have been aging we mustn't have been aging you mustn't have been aging they mustn't have been aging
Interrogative form
Simple form
must I age? must you age? must she age? must we age? must you age? must they age?
V-ing form
must I be aging? must you be aging? must she be aging? must we be aging? must you be aging? must they be aging?
Perfect
must I have aged? must you have aged? must she have aged? must we have aged? must you have aged? must they have aged?
V-ing perfect
must I have been aging? must you have been aging? must she have been aging? must we have been aging? must you have been aging? must they have been aging?
Interro-negative form
Simple form
mustn't I age? mustn't you age? mustn't she age? mustn't we age? mustn't you age? mustn't they age?
V-ing form
mustn't I be aging? mustn't you be aging? mustn't she be aging? mustn't we be aging? mustn't you be aging? mustn't they be aging?
Perfect
mustn't I have aged? mustn't you have aged? mustn't she have aged? mustn't we have aged? mustn't you have aged? mustn't they have aged?
V-ing perfect
mustn't I have been aging? mustn't you have been aging? mustn't she have been aging? mustn't we have been aging? mustn't you have been aging? mustn't they have been aging?