shall half-mast
Regular verb: half-mast - half-masted- half-masted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall half-mast
you shall half-mast
he shall half-mast
we shall half-mast
you shall half-mast
they shall half-mast 	I shall be half-masting
you shall be half-masting
he shall be half-masting
we shall be half-masting
you shall be half-masting
they shall be half-masting	I shall have half-masted
you shall have half-masted
he shall have half-masted
we shall have half-masted
you shall have half-masted
they shall have half-masted	I shall have been half-masting
you shall have been half-masting
he shall have been half-masting
we shall have been half-masting
you shall have been half-masting
they shall have been half-masting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not half-mast
you shall not half-mast
he shall not half-mast
we shall not half-mast
you shall not half-mast
they shall not half-mast 	I shall not be half-masting
you shall not be half-masting
he shall not be half-masting
we shall not be half-masting
you shall not be half-masting
they shall not be half-masting	I shall not have half-masted
you shall not have half-masted
he shall not have half-masted
we shall not have half-masted
you shall not have half-masted
they shall not have half-masted	I shall not have been half-masting
you shall not have been half-masting
he shall not have been half-masting
we shall not have been half-masting
you shall not have been half-masting
they shall not have been half-masting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I half-mast?
shall you half-mast?
shall he half-mast?
shall we half-mast?
shall you half-mast?
shall they half-mast? 	shall I be half-masting?
shall you be half-masting?
shall he be half-masting?
shall we be half-masting?
shall you be half-masting?
shall they be half-masting? 	shall I have half-masted?
shall you have half-masted?
shall he have half-masted?
shall we have half-masted?
shall you have half-masted?
shall they have half-masted? 	shall I have been half-masting?
shall you have been half-masting?
shall he have been half-masting?
shall we have been half-masting?
shall you have been half-masting?
shall they have been half-masting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not half-mast?
shall you not half-mast?
shall he not half-mast?
shall we not half-mast?
shall you not half-mast?
shall they not half-mast? 	shall I not be half-masting?
shall you not be half-masting?
shall he not be half-masting?
shall we not be half-masting?
shall you not be half-masting?
shall they not be half-masting? 	shall I not have half-masted?
shall you not have half-masted?
shall he not have half-masted?
shall we not have half-masted?
shall you not have half-masted?
shall they not have half-masted? 	shall I not have been half-masting?
shall you not have been half-masting?
shall he not have been half-masting?
shall we not have been half-masting?
shall you not have been half-masting?
shall they not have been half-masting?