must half-mast
Verbe régulier : half-mast - half-masted- half-masted

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must half-mast
you must half-mast
he must half-mast
we must half-mast
you must half-mast
they must half-mast 	I must be half-masting
you must be half-masting
he must be half-masting
we must be half-masting
you must be half-masting
they must be half-masting	I must have half-masted
you must have half-masted
he must have half-masted
we must have half-masted
you must have half-masted
they must have half-masted	I must have been half-masting
you must have been half-masting
he must have been half-masting
we must have been half-masting
you must have been half-masting
they must have been half-masting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not half-mast
you must not half-mast
he must not half-mast
we must not half-mast
you must not half-mast
they must not half-mast 	I must not be half-masting
you must not be half-masting
he must not be half-masting
we must not be half-masting
you must not be half-masting
they must not be half-masting	I must not have half-masted
you must not have half-masted
he must not have half-masted
we must not have half-masted
you must not have half-masted
they must not have half-masted	I must not have been half-masting
you must not have been half-masting
he must not have been half-masting
we must not have been half-masting
you must not have been half-masting
they must not have been half-masting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I half-mast?
must you half-mast?
must he half-mast?
must we half-mast?
must you half-mast?
must they half-mast? 	must I be half-masting?
must you be half-masting?
must he be half-masting?
must we be half-masting?
must you be half-masting?
must they be half-masting? 	must I have half-masted?
must you have half-masted?
must he have half-masted?
must we have half-masted?
must you have half-masted?
must they have half-masted? 	must I have been half-masting?
must you have been half-masting?
must he have been half-masting?
must we have been half-masting?
must you have been half-masting?
must they have been half-masting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not half-mast?
must you not half-mast?
must he not half-mast?
must we not half-mast?
must you not half-mast?
must they not half-mast? 	must I not be half-masting?
must you not be half-masting?
must he not be half-masting?
must we not be half-masting?
must you not be half-masting?
must they not be half-masting? 	must I not have half-masted?
must you not have half-masted?
must he not have half-masted?
must we not have half-masted?
must you not have half-masted?
must they not have half-masted? 	must I not have been half-masting?
must you not have been half-masting?
must he not have been half-masting?
must we not have been half-masting?
must you not have been half-masting?
must they not have been half-masting?