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