I must countermarch you must countermarch he must countermarch we must countermarch you must countermarch they must countermarch
V-ing form
I must be countermarching you must be countermarching he must be countermarching we must be countermarching you must be countermarching they must be countermarching
Perfect
I must have countermarched you must have countermarched he must have countermarched we must have countermarched you must have countermarched they must have countermarched
V-ing perfect
I must have been countermarching you must have been countermarching he must have been countermarching we must have been countermarching you must have been countermarching they must have been countermarching
Negation
Simple form
I must not countermarch you must not countermarch he must not countermarch we must not countermarch you must not countermarch they must not countermarch
V-ing form
I must not be countermarching you must not be countermarching he must not be countermarching we must not be countermarching you must not be countermarching they must not be countermarching
Perfect
I must not have countermarched you must not have countermarched he must not have countermarched we must not have countermarched you must not have countermarched they must not have countermarched
V-ing perfect
I must not have been countermarching you must not have been countermarching he must not have been countermarching we must not have been countermarching you must not have been countermarching they must not have been countermarching
Interrogative form
Simple form
must I countermarch? must you countermarch? must he countermarch? must we countermarch? must you countermarch? must they countermarch?
V-ing form
must I be countermarching? must you be countermarching? must he be countermarching? must we be countermarching? must you be countermarching? must they be countermarching?
Perfect
must I have countermarched? must you have countermarched? must he have countermarched? must we have countermarched? must you have countermarched? must they have countermarched?
V-ing perfect
must I have been countermarching? must you have been countermarching? must he have been countermarching? must we have been countermarching? must you have been countermarching? must they have been countermarching?
Interro-negative form
Simple form
must I not countermarch? must you not countermarch? must he not countermarch? must we not countermarch? must you not countermarch? must they not countermarch?
V-ing form
must I not be countermarching? must you not be countermarching? must he not be countermarching? must we not be countermarching? must you not be countermarching? must they not be countermarching?
Perfect
must I not have countermarched? must you not have countermarched? must he not have countermarched? must we not have countermarched? must you not have countermarched? must they not have countermarched?
V-ing perfect
must I not have been countermarching? must you not have been countermarching? must he not have been countermarching? must we not have been countermarching? must you not have been countermarching? must they not have been countermarching?