I must age you must age he must age we must age you must age they must age
V-ing form
I must be aging you must be aging he must be aging we must be aging you must be aging they must be aging
Perfect
I must have aged you must have aged he 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 he 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 he 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 he 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 he 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 he 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 he age? must we age? must you age? must they age?
V-ing form
must I be aging? must you be aging? must he be aging? must we be aging? must you be aging? must they be aging?
Perfect
must I have aged? must you have aged? must he 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 he 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 he 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 he 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 he 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 he have been aging? mustn't we have been aging? mustn't you have been aging? mustn't they have been aging?