must bar
Regular verb: bar - barred- barred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must bar
you must bar
he must bar
we must bar
you must bar
they must bar 	I must be barring
you must be barring
he must be barring
we must be barring
you must be barring
they must be barring	I must have barred
you must have barred
he must have barred
we must have barred
you must have barred
they must have barred	I must have been barring
you must have been barring
he must have been barring
we must have been barring
you must have been barring
they must have been barring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't bar
you mustn't bar
he mustn't bar
we mustn't bar
you mustn't bar
they mustn't bar 	I mustn't be barring
you mustn't be barring
he mustn't be barring
we mustn't be barring
you mustn't be barring
they mustn't be barring	I mustn't have barred
you mustn't have barred
he mustn't have barred
we mustn't have barred
you mustn't have barred
they mustn't have barred	I mustn't have been barring
you mustn't have been barring
he mustn't have been barring
we mustn't have been barring
you mustn't have been barring
they mustn't have been barring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I bar?
must you bar?
must he bar?
must we bar?
must you bar?
must they bar? 	must I be barring?
must you be barring?
must he be barring?
must we be barring?
must you be barring?
must they be barring? 	must I have barred?
must you have barred?
must he have barred?
must we have barred?
must you have barred?
must they have barred? 	must I have been barring?
must you have been barring?
must he have been barring?
must we have been barring?
must you have been barring?
must they have been barring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I bar?
mustn't you bar?
mustn't he bar?
mustn't we bar?
mustn't you bar?
mustn't they bar? 	mustn't I be barring?
mustn't you be barring?
mustn't he be barring?
mustn't we be barring?
mustn't you be barring?
mustn't they be barring? 	mustn't I have barred?
mustn't you have barred?
mustn't he have barred?
mustn't we have barred?
mustn't you have barred?
mustn't they have barred? 	mustn't I have been barring?
mustn't you have been barring?
mustn't he have been barring?
mustn't we have been barring?
mustn't you have been barring?
mustn't they have been barring?