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 must not barter
you must not barter
she must not barter
we must not barter
you must not barter
they must not barter 	I must not be bartering
you must not be bartering
she must not be bartering
we must not be bartering
you must not be bartering
they must not be bartering	I must not have bartered
you must not have bartered
she must not have bartered
we must not have bartered
you must not have bartered
they must not have bartered	I must not have been bartering
you must not have been bartering
she must not have been bartering
we must not have been bartering
you must not have been bartering
they must not 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 	
must I not barter?
must you not barter?
must she not barter?
must we not barter?
must you not barter?
must they not barter? 	must I not be bartering?
must you not be bartering?
must she not be bartering?
must we not be bartering?
must you not be bartering?
must they not be bartering? 	must I not have bartered?
must you not have bartered?
must she not have bartered?
must we not have bartered?
must you not have bartered?
must they not have bartered? 	must I not have been bartering?
must you not have been bartering?
must she not have been bartering?
must we not have been bartering?
must you not have been bartering?
must they not have been bartering?