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 must not seine
you must not seine
he must not seine
we must not seine
you must not seine
they must not seine 	I must not be seining
you must not be seining
he must not be seining
we must not be seining
you must not be seining
they must not be seining	I must not have seined
you must not have seined
he must not have seined
we must not have seined
you must not have seined
they must not have seined	I must not have been seining
you must not have been seining
he must not have been seining
we must not have been seining
you must not have been seining
they must not 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 	
must I not seine?
must you not seine?
must he not seine?
must we not seine?
must you not seine?
must they not seine? 	must I not be seining?
must you not be seining?
must he not be seining?
must we not be seining?
must you not be seining?
must they not be seining? 	must I not have seined?
must you not have seined?
must he not have seined?
must we not have seined?
must you not have seined?
must they not have seined? 	must I not have been seining?
must you not have been seining?
must he not have been seining?
must we not have been seining?
must you not have been seining?
must they not have been seining?