English verb conjugation
MUST COUNTERMAND

Regular verb: countermand - countermanded - countermanded

Affirmation

Simple form	V-ing form
I must countermand you must countermand he must countermand we must countermand you must countermand they must countermand	I must be countermanding you must be countermanding he must be countermanding we must be countermanding you must be countermanding they must be countermanding
Perfect	V-ing perfect
I must have countermanded you must have countermanded he must have countermanded we must have countermanded you must have countermanded they must have countermanded	I must have been countermanding you must have been countermanding he must have been countermanding we must have been countermanding you must have been countermanding they must have been countermanding

Negation

Simple form	V-ing form
I must not countermand you must not countermand he must not countermand we must not countermand you must not countermand they must not countermand	I must not be countermanding you must not be countermanding he must not be countermanding we must not be countermanding you must not be countermanding they must not be countermanding
Perfect	V-ing perfect
I must not have countermanded you must not have countermanded he must not have countermanded we must not have countermanded you must not have countermanded they must not have countermanded	I must not have been countermanding you must not have been countermanding he must not have been countermanding we must not have been countermanding you must not have been countermanding they must not have been countermanding

Interrogative form

Simple form	V-ing form
must I countermand? must you countermand? must he countermand? must we countermand? must you countermand? must they countermand?	must I be countermanding? must you be countermanding? must he be countermanding? must we be countermanding? must you be countermanding? must they be countermanding?
Perfect	V-ing perfect
must I have countermanded? must you have countermanded? must he have countermanded? must we have countermanded? must you have countermanded? must they have countermanded?	must I have been countermanding? must you have been countermanding? must he have been countermanding? must we have been countermanding? must you have been countermanding? must they have been countermanding?

Interro-negative form

Simple form	V-ing form
must I not countermand? must you not countermand? must he not countermand? must we not countermand? must you not countermand? must they not countermand?	must I not be countermanding? must you not be countermanding? must he not be countermanding? must we not be countermanding? must you not be countermanding? must they not be countermanding?
Perfect	V-ing perfect
must I not have countermanded? must you not have countermanded? must he not have countermanded? must we not have countermanded? must you not have countermanded? must they not have countermanded?	must I not have been countermanding? must you not have been countermanding? must he not have been countermanding? must we not have been countermanding? must you not have been countermanding? must they not have been countermanding?