I must port you must port he must port we must port you must port they must port
V-ing form
I must be porting you must be porting he must be porting we must be porting you must be porting they must be porting
Perfect
I must have ported you must have ported he must have ported we must have ported you must have ported they must have ported
V-ing perfect
I must have been porting you must have been porting he must have been porting we must have been porting you must have been porting they must have been porting
Negation
Simple form
I must not port you must not port he must not port we must not port you must not port they must not port
V-ing form
I must not be porting you must not be porting he must not be porting we must not be porting you must not be porting they must not be porting
Perfect
I must not have ported you must not have ported he must not have ported we must not have ported you must not have ported they must not have ported
V-ing perfect
I must not have been porting you must not have been porting he must not have been porting we must not have been porting you must not have been porting they must not have been porting
Interrogative form
Simple form
must I port? must you port? must he port? must we port? must you port? must they port?
V-ing form
must I be porting? must you be porting? must he be porting? must we be porting? must you be porting? must they be porting?
Perfect
must I have ported? must you have ported? must he have ported? must we have ported? must you have ported? must they have ported?
V-ing perfect
must I have been porting? must you have been porting? must he have been porting? must we have been porting? must you have been porting? must they have been porting?
Interro-negative form
Simple form
must I not port? must you not port? must he not port? must we not port? must you not port? must they not port?
V-ing form
must I not be porting? must you not be porting? must he not be porting? must we not be porting? must you not be porting? must they not be porting?
Perfect
must I not have ported? must you not have ported? must he not have ported? must we not have ported? must you not have ported? must they not have ported?
V-ing perfect
must I not have been porting? must you not have been porting? must he not have been porting? must we not have been porting? must you not have been porting? must they not have been porting?