must seine
Verbe régulier : seine - seined- seined

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must seine
you must seine
he must seine
we must seine
you must seine
they must seine 	I must be seining
you must be seining
he must be seining
we must be seining
you must be seining
they must be seining	I must have seined
you must have seined
he must have seined
we must have seined
you must have seined
they must have seined	I must have been seining
you must have been seining
he must have been seining
we must have been seining
you must have been seining
they must have been seining	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't seine
you mustn't seine
he mustn't seine
we mustn't seine
you mustn't seine
they mustn't seine 	I mustn't be seining
you mustn't be seining
he mustn't be seining
we mustn't be seining
you mustn't be seining
they mustn't be seining	I mustn't have seined
you mustn't have seined
he mustn't have seined
we mustn't have seined
you mustn't have seined
they mustn't have seined	I mustn't have been seining
you mustn't have been seining
he mustn't have been seining
we mustn't have been seining
you mustn't have been seining
they mustn't have been seining	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I seine?
must you seine?
must he seine?
must we seine?
must you seine?
must they seine? 	must I be seining?
must you be seining?
must he be seining?
must we be seining?
must you be seining?
must they be seining? 	must I have seined?
must you have seined?
must he have seined?
must we have seined?
must you have seined?
must they have seined? 	must I have been seining?
must you have been seining?
must he have been seining?
must we have been seining?
must you have been seining?
must they have been seining? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I seine?
mustn't you seine?
mustn't he seine?
mustn't we seine?
mustn't you seine?
mustn't they seine? 	mustn't I be seining?
mustn't you be seining?
mustn't he be seining?
mustn't we be seining?
mustn't you be seining?
mustn't they be seining? 	mustn't I have seined?
mustn't you have seined?
mustn't he have seined?
mustn't we have seined?
mustn't you have seined?
mustn't they have seined? 	mustn't I have been seining?
mustn't you have been seining?
mustn't he have been seining?
mustn't we have been seining?
mustn't you have been seining?
mustn't they have been seining?