must countermarch
Verbe régulier : countermarch - countermarched- countermarched

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must countermarch
you must countermarch
she must countermarch
we must countermarch
you must countermarch
they must countermarch 	I must be countermarching
you must be countermarching
she must be countermarching
we must be countermarching
you must be countermarching
they must be countermarching	I must have countermarched
you must have countermarched
she must have countermarched
we must have countermarched
you must have countermarched
they must have countermarched	I must have been countermarching
you must have been countermarching
she must have been countermarching
we must have been countermarching
you must have been countermarching
they must have been countermarching	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not countermarch
you must not countermarch
she must not countermarch
we must not countermarch
you must not countermarch
they must not countermarch 	I must not be countermarching
you must not be countermarching
she must not be countermarching
we must not be countermarching
you must not be countermarching
they must not be countermarching	I must not have countermarched
you must not have countermarched
she must not have countermarched
we must not have countermarched
you must not have countermarched
they must not have countermarched	I must not have been countermarching
you must not have been countermarching
she must not have been countermarching
we must not have been countermarching
you must not have been countermarching
they must not have been countermarching	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I countermarch?
must you countermarch?
must she countermarch?
must we countermarch?
must you countermarch?
must they countermarch? 	must I be countermarching?
must you be countermarching?
must she be countermarching?
must we be countermarching?
must you be countermarching?
must they be countermarching? 	must I have countermarched?
must you have countermarched?
must she have countermarched?
must we have countermarched?
must you have countermarched?
must they have countermarched? 	must I have been countermarching?
must you have been countermarching?
must she have been countermarching?
must we have been countermarching?
must you have been countermarching?
must they have been countermarching? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not countermarch?
must you not countermarch?
must she not countermarch?
must we not countermarch?
must you not countermarch?
must they not countermarch? 	must I not be countermarching?
must you not be countermarching?
must she not be countermarching?
must we not be countermarching?
must you not be countermarching?
must they not be countermarching? 	must I not have countermarched?
must you not have countermarched?
must she not have countermarched?
must we not have countermarched?
must you not have countermarched?
must they not have countermarched? 	must I not have been countermarching?
must you not have been countermarching?
must she not have been countermarching?
must we not have been countermarching?
must you not have been countermarching?
must they not have been countermarching?