I must ban you must ban he must ban we must ban you must ban they must ban
V-ing form
I must be banning you must be banning he must be banning we must be banning you must be banning they must be banning
Perfect
I must have banned you must have banned he must have banned we must have banned you must have banned they must have banned
V-ing perfect
I must have been banning you must have been banning he must have been banning we must have been banning you must have been banning they must have been banning
Negation
Simple form
I must not ban you must not ban he must not ban we must not ban you must not ban they must not ban
V-ing form
I must not be banning you must not be banning he must not be banning we must not be banning you must not be banning they must not be banning
Perfect
I must not have banned you must not have banned he must not have banned we must not have banned you must not have banned they must not have banned
V-ing perfect
I must not have been banning you must not have been banning he must not have been banning we must not have been banning you must not have been banning they must not have been banning
Interrogative form
Simple form
must I ban? must you ban? must he ban? must we ban? must you ban? must they ban?
V-ing form
must I be banning? must you be banning? must he be banning? must we be banning? must you be banning? must they be banning?
Perfect
must I have banned? must you have banned? must he have banned? must we have banned? must you have banned? must they have banned?
V-ing perfect
must I have been banning? must you have been banning? must he have been banning? must we have been banning? must you have been banning? must they have been banning?
Interro-negative form
Simple form
must I not ban? must you not ban? must he not ban? must we not ban? must you not ban? must they not ban?
V-ing form
must I not be banning? must you not be banning? must he not be banning? must we not be banning? must you not be banning? must they not be banning?
Perfect
must I not have banned? must you not have banned? must he not have banned? must we not have banned? must you not have banned? must they not have banned?
V-ing perfect
must I not have been banning? must you not have been banning? must he not have been banning? must we not have been banning? must you not have been banning? must they not have been banning?