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 must not show you must not show he must not show we must not show you must not show they must not show
V-ing form
I must not be showing you must not be showing he must not be showing we must not be showing you must not be showing they must not be showing
Perfect
I must not have shown you must not have shown he must not have shown we must not have shown you must not have shown they must not have shown
V-ing perfect
I must not have been showing you must not have been showing he must not have been showing we must not have been showing you must not have been showing they must not 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
must I not show? must you not show? must he not show? must we not show? must you not show? must they not show?
V-ing form
must I not be showing? must you not be showing? must he not be showing? must we not be showing? must you not be showing? must they not be showing?
Perfect
must I not have shown? must you not have shown? must he not have shown? must we not have shown? must you not have shown? must they not have shown?
V-ing perfect
must I not have been showing? must you not have been showing? must he not have been showing? must we not have been showing? must you not have been showing? must they not have been showing?