must about-face
Regular verb: about-face - about-faced- about-faced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must about-face
you must about-face
he must about-face
we must about-face
you must about-face
they must about-face 	I must be about-facing
you must be about-facing
he must be about-facing
we must be about-facing
you must be about-facing
they must be about-facing	I must have about-faced
you must have about-faced
he must have about-faced
we must have about-faced
you must have about-faced
they must have about-faced	I must have been about-facing
you must have been about-facing
he must have been about-facing
we must have been about-facing
you must have been about-facing
they must have been about-facing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't about-face
you mustn't about-face
he mustn't about-face
we mustn't about-face
you mustn't about-face
they mustn't about-face 	I mustn't be about-facing
you mustn't be about-facing
he mustn't be about-facing
we mustn't be about-facing
you mustn't be about-facing
they mustn't be about-facing	I mustn't have about-faced
you mustn't have about-faced
he mustn't have about-faced
we mustn't have about-faced
you mustn't have about-faced
they mustn't have about-faced	I mustn't have been about-facing
you mustn't have been about-facing
he mustn't have been about-facing
we mustn't have been about-facing
you mustn't have been about-facing
they mustn't have been about-facing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I about-face?
must you about-face?
must he about-face?
must we about-face?
must you about-face?
must they about-face? 	must I be about-facing?
must you be about-facing?
must he be about-facing?
must we be about-facing?
must you be about-facing?
must they be about-facing? 	must I have about-faced?
must you have about-faced?
must he have about-faced?
must we have about-faced?
must you have about-faced?
must they have about-faced? 	must I have been about-facing?
must you have been about-facing?
must he have been about-facing?
must we have been about-facing?
must you have been about-facing?
must they have been about-facing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I about-face?
mustn't you about-face?
mustn't he about-face?
mustn't we about-face?
mustn't you about-face?
mustn't they about-face? 	mustn't I be about-facing?
mustn't you be about-facing?
mustn't he be about-facing?
mustn't we be about-facing?
mustn't you be about-facing?
mustn't they be about-facing? 	mustn't I have about-faced?
mustn't you have about-faced?
mustn't he have about-faced?
mustn't we have about-faced?
mustn't you have about-faced?
mustn't they have about-faced? 	mustn't I have been about-facing?
mustn't you have been about-facing?
mustn't he have been about-facing?
mustn't we have been about-facing?
mustn't you have been about-facing?
mustn't they have been about-facing?