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
he must countermarch
we must countermarch
you must countermarch
they must countermarch 	I must be countermarching
you must be countermarching
he must be countermarching
we must be countermarching
you must be countermarching
they must be countermarching	I must have countermarched
you must have countermarched
he 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
he 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 mustn't countermarch
you mustn't countermarch
he mustn't countermarch
we mustn't countermarch
you mustn't countermarch
they mustn't countermarch 	I mustn't be countermarching
you mustn't be countermarching
he mustn't be countermarching
we mustn't be countermarching
you mustn't be countermarching
they mustn't be countermarching	I mustn't have countermarched
you mustn't have countermarched
he mustn't have countermarched
we mustn't have countermarched
you mustn't have countermarched
they mustn't have countermarched	I mustn't have been countermarching
you mustn't have been countermarching
he mustn't have been countermarching
we mustn't have been countermarching
you mustn't have been countermarching
they mustn't have been countermarching	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I countermarch?
must you countermarch?
must he countermarch?
must we countermarch?
must you countermarch?
must they countermarch? 	must I be countermarching?
must you be countermarching?
must he be countermarching?
must we be countermarching?
must you be countermarching?
must they be countermarching? 	must I have countermarched?
must you have countermarched?
must he 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 he 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 	
mustn't I countermarch?
mustn't you countermarch?
mustn't he countermarch?
mustn't we countermarch?
mustn't you countermarch?
mustn't they countermarch? 	mustn't I be countermarching?
mustn't you be countermarching?
mustn't he be countermarching?
mustn't we be countermarching?
mustn't you be countermarching?
mustn't they be countermarching? 	mustn't I have countermarched?
mustn't you have countermarched?
mustn't he have countermarched?
mustn't we have countermarched?
mustn't you have countermarched?
mustn't they have countermarched? 	mustn't I have been countermarching?
mustn't you have been countermarching?
mustn't he have been countermarching?
mustn't we have been countermarching?
mustn't you have been countermarching?
mustn't they have been countermarching?