must countermand
Verbo regular: countermand - countermanded- countermanded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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?