I must pore you must pore he must pore we must pore you must pore they must pore
V-ing form
I must be poring you must be poring he must be poring we must be poring you must be poring they must be poring
Perfect
I must have pored you must have pored he must have pored we must have pored you must have pored they must have pored
V-ing perfect
I must have been poring you must have been poring he must have been poring we must have been poring you must have been poring they must have been poring
Negation
Simple form
I must not pore you must not pore he must not pore we must not pore you must not pore they must not pore
V-ing form
I must not be poring you must not be poring he must not be poring we must not be poring you must not be poring they must not be poring
Perfect
I must not have pored you must not have pored he must not have pored we must not have pored you must not have pored they must not have pored
V-ing perfect
I must not have been poring you must not have been poring he must not have been poring we must not have been poring you must not have been poring they must not have been poring
Interrogative form
Simple form
must I pore? must you pore? must he pore? must we pore? must you pore? must they pore?
V-ing form
must I be poring? must you be poring? must he be poring? must we be poring? must you be poring? must they be poring?
Perfect
must I have pored? must you have pored? must he have pored? must we have pored? must you have pored? must they have pored?
V-ing perfect
must I have been poring? must you have been poring? must he have been poring? must we have been poring? must you have been poring? must they have been poring?
Interro-negative form
Simple form
must I not pore? must you not pore? must he not pore? must we not pore? must you not pore? must they not pore?
V-ing form
must I not be poring? must you not be poring? must he not be poring? must we not be poring? must you not be poring? must they not be poring?
Perfect
must I not have pored? must you not have pored? must he not have pored? must we not have pored? must you not have pored? must they not have pored?
V-ing perfect
must I not have been poring? must you not have been poring? must he not have been poring? must we not have been poring? must you not have been poring? must they not have been poring?