must barber
Regular verb: barber - barbered- barbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must barber
you must barber
she must barber
we must barber
you must barber
they must barber 	I must be barbering
you must be barbering
she must be barbering
we must be barbering
you must be barbering
they must be barbering	I must have barbered
you must have barbered
she must have barbered
we must have barbered
you must have barbered
they must have barbered	I must have been barbering
you must have been barbering
she must have been barbering
we must have been barbering
you must have been barbering
they must have been barbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't barber
you mustn't barber
she mustn't barber
we mustn't barber
you mustn't barber
they mustn't barber 	I mustn't be barbering
you mustn't be barbering
she mustn't be barbering
we mustn't be barbering
you mustn't be barbering
they mustn't be barbering	I mustn't have barbered
you mustn't have barbered
she mustn't have barbered
we mustn't have barbered
you mustn't have barbered
they mustn't have barbered	I mustn't have been barbering
you mustn't have been barbering
she mustn't have been barbering
we mustn't have been barbering
you mustn't have been barbering
they mustn't have been barbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I barber?
must you barber?
must she barber?
must we barber?
must you barber?
must they barber? 	must I be barbering?
must you be barbering?
must she be barbering?
must we be barbering?
must you be barbering?
must they be barbering? 	must I have barbered?
must you have barbered?
must she have barbered?
must we have barbered?
must you have barbered?
must they have barbered? 	must I have been barbering?
must you have been barbering?
must she have been barbering?
must we have been barbering?
must you have been barbering?
must they have been barbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I barber?
mustn't you barber?
mustn't she barber?
mustn't we barber?
mustn't you barber?
mustn't they barber? 	mustn't I be barbering?
mustn't you be barbering?
mustn't she be barbering?
mustn't we be barbering?
mustn't you be barbering?
mustn't they be barbering? 	mustn't I have barbered?
mustn't you have barbered?
mustn't she have barbered?
mustn't we have barbered?
mustn't you have barbered?
mustn't they have barbered? 	mustn't I have been barbering?
mustn't you have been barbering?
mustn't she have been barbering?
mustn't we have been barbering?
mustn't you have been barbering?
mustn't they have been barbering?