must niche
Verbe régulier : niche - niched- niched

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must niche
you must niche
he must niche
we must niche
you must niche
they must niche 	I must be niching
you must be niching
he must be niching
we must be niching
you must be niching
they must be niching	I must have niched
you must have niched
he must have niched
we must have niched
you must have niched
they must have niched	I must have been niching
you must have been niching
he must have been niching
we must have been niching
you must have been niching
they must have been niching	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't niche
you mustn't niche
he mustn't niche
we mustn't niche
you mustn't niche
they mustn't niche 	I mustn't be niching
you mustn't be niching
he mustn't be niching
we mustn't be niching
you mustn't be niching
they mustn't be niching	I mustn't have niched
you mustn't have niched
he mustn't have niched
we mustn't have niched
you mustn't have niched
they mustn't have niched	I mustn't have been niching
you mustn't have been niching
he mustn't have been niching
we mustn't have been niching
you mustn't have been niching
they mustn't have been niching	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I niche?
must you niche?
must he niche?
must we niche?
must you niche?
must they niche? 	must I be niching?
must you be niching?
must he be niching?
must we be niching?
must you be niching?
must they be niching? 	must I have niched?
must you have niched?
must he have niched?
must we have niched?
must you have niched?
must they have niched? 	must I have been niching?
must you have been niching?
must he have been niching?
must we have been niching?
must you have been niching?
must they have been niching? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I niche?
mustn't you niche?
mustn't he niche?
mustn't we niche?
mustn't you niche?
mustn't they niche? 	mustn't I be niching?
mustn't you be niching?
mustn't he be niching?
mustn't we be niching?
mustn't you be niching?
mustn't they be niching? 	mustn't I have niched?
mustn't you have niched?
mustn't he have niched?
mustn't we have niched?
mustn't you have niched?
mustn't they have niched? 	mustn't I have been niching?
mustn't you have been niching?
mustn't he have been niching?
mustn't we have been niching?
mustn't you have been niching?
mustn't they have been niching?