English verb conjugation
MUST ROB

Regular verb: rob - robbed - robbed

Affirmation

Simple form	V-ing form
I must rob you must rob he must rob we must rob you must rob they must rob	I must be robbing you must be robbing he must be robbing we must be robbing you must be robbing they must be robbing
Perfect	V-ing perfect
I must have robbed you must have robbed he must have robbed we must have robbed you must have robbed they must have robbed	I must have been robbing you must have been robbing he must have been robbing we must have been robbing you must have been robbing they must have been robbing

Negation

Simple form	V-ing form
I must not rob you must not rob he must not rob we must not rob you must not rob they must not rob	I must not be robbing you must not be robbing he must not be robbing we must not be robbing you must not be robbing they must not be robbing
Perfect	V-ing perfect
I must not have robbed you must not have robbed he must not have robbed we must not have robbed you must not have robbed they must not have robbed	I must not have been robbing you must not have been robbing he must not have been robbing we must not have been robbing you must not have been robbing they must not have been robbing

Interrogative form

Simple form	V-ing form
must I rob? must you rob? must he rob? must we rob? must you rob? must they rob?	must I be robbing? must you be robbing? must he be robbing? must we be robbing? must you be robbing? must they be robbing?
Perfect	V-ing perfect
must I have robbed? must you have robbed? must he have robbed? must we have robbed? must you have robbed? must they have robbed?	must I have been robbing? must you have been robbing? must he have been robbing? must we have been robbing? must you have been robbing? must they have been robbing?

Interro-negative form

Simple form	V-ing form
must I not rob? must you not rob? must he not rob? must we not rob? must you not rob? must they not rob?	must I not be robbing? must you not be robbing? must he not be robbing? must we not be robbing? must you not be robbing? must they not be robbing?
Perfect	V-ing perfect
must I not have robbed? must you not have robbed? must he not have robbed? must we not have robbed? must you not have robbed? must they not have robbed?	must I not have been robbing? must you not have been robbing? must he not have been robbing? must we not have been robbing? must you not have been robbing? must they not have been robbing?