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