must barter
Regular verb: barter - bartered- bartered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must barter
you must barter
she must barter
we must barter
you must barter
they must barter 	I must be bartering
you must be bartering
she must be bartering
we must be bartering
you must be bartering
they must be bartering	I must have bartered
you must have bartered
she must have bartered
we must have bartered
you must have bartered
they must have bartered	I must have been bartering
you must have been bartering
she must have been bartering
we must have been bartering
you must have been bartering
they must have been bartering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't barter
you mustn't barter
she mustn't barter
we mustn't barter
you mustn't barter
they mustn't barter 	I mustn't be bartering
you mustn't be bartering
she mustn't be bartering
we mustn't be bartering
you mustn't be bartering
they mustn't be bartering	I mustn't have bartered
you mustn't have bartered
she mustn't have bartered
we mustn't have bartered
you mustn't have bartered
they mustn't have bartered	I mustn't have been bartering
you mustn't have been bartering
she mustn't have been bartering
we mustn't have been bartering
you mustn't have been bartering
they mustn't have been bartering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I barter?
must you barter?
must she barter?
must we barter?
must you barter?
must they barter? 	must I be bartering?
must you be bartering?
must she be bartering?
must we be bartering?
must you be bartering?
must they be bartering? 	must I have bartered?
must you have bartered?
must she have bartered?
must we have bartered?
must you have bartered?
must they have bartered? 	must I have been bartering?
must you have been bartering?
must she have been bartering?
must we have been bartering?
must you have been bartering?
must they have been bartering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I barter?
mustn't you barter?
mustn't she barter?
mustn't we barter?
mustn't you barter?
mustn't they barter? 	mustn't I be bartering?
mustn't you be bartering?
mustn't she be bartering?
mustn't we be bartering?
mustn't you be bartering?
mustn't they be bartering? 	mustn't I have bartered?
mustn't you have bartered?
mustn't she have bartered?
mustn't we have bartered?
mustn't you have bartered?
mustn't they have bartered? 	mustn't I have been bartering?
mustn't you have been bartering?
mustn't she have been bartering?
mustn't we have been bartering?
mustn't you have been bartering?
mustn't they have been bartering?