I must pan you must pan he must pan we must pan you must pan they must pan
V-ing form
I must be panning you must be panning he must be panning we must be panning you must be panning they must be panning
Perfect
I must have panned you must have panned he must have panned we must have panned you must have panned they must have panned
V-ing perfect
I must have been panning you must have been panning he must have been panning we must have been panning you must have been panning they must have been panning
Negation
Simple form
I must not pan you must not pan he must not pan we must not pan you must not pan they must not pan
V-ing form
I must not be panning you must not be panning he must not be panning we must not be panning you must not be panning they must not be panning
Perfect
I must not have panned you must not have panned he must not have panned we must not have panned you must not have panned they must not have panned
V-ing perfect
I must not have been panning you must not have been panning he must not have been panning we must not have been panning you must not have been panning they must not have been panning
Interrogative form
Simple form
must I pan? must you pan? must he pan? must we pan? must you pan? must they pan?
V-ing form
must I be panning? must you be panning? must he be panning? must we be panning? must you be panning? must they be panning?
Perfect
must I have panned? must you have panned? must he have panned? must we have panned? must you have panned? must they have panned?
V-ing perfect
must I have been panning? must you have been panning? must he have been panning? must we have been panning? must you have been panning? must they have been panning?
Interro-negative form
Simple form
must I not pan? must you not pan? must he not pan? must we not pan? must you not pan? must they not pan?
V-ing form
must I not be panning? must you not be panning? must he not be panning? must we not be panning? must you not be panning? must they not be panning?
Perfect
must I not have panned? must you not have panned? must he not have panned? must we not have panned? must you not have panned? must they not have panned?
V-ing perfect
must I not have been panning? must you not have been panning? must he not have been panning? must we not have been panning? must you not have been panning? must they not have been panning?