must bust
Regular verb: bust - busted- busted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must bust
you must bust
she must bust
we must bust
you must bust
they must bust 	I must be busting
you must be busting
she must be busting
we must be busting
you must be busting
they must be busting	I must have busted
you must have busted
she must have busted
we must have busted
you must have busted
they must have busted	I must have been busting
you must have been busting
she must have been busting
we must have been busting
you must have been busting
they must have been busting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not bust
you must not bust
she must not bust
we must not bust
you must not bust
they must not bust 	I must not be busting
you must not be busting
she must not be busting
we must not be busting
you must not be busting
they must not be busting	I must not have busted
you must not have busted
she must not have busted
we must not have busted
you must not have busted
they must not have busted	I must not have been busting
you must not have been busting
she must not have been busting
we must not have been busting
you must not have been busting
they must not have been busting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I bust?
must you bust?
must she bust?
must we bust?
must you bust?
must they bust? 	must I be busting?
must you be busting?
must she be busting?
must we be busting?
must you be busting?
must they be busting? 	must I have busted?
must you have busted?
must she have busted?
must we have busted?
must you have busted?
must they have busted? 	must I have been busting?
must you have been busting?
must she have been busting?
must we have been busting?
must you have been busting?
must they have been busting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not bust?
must you not bust?
must she not bust?
must we not bust?
must you not bust?
must they not bust? 	must I not be busting?
must you not be busting?
must she not be busting?
must we not be busting?
must you not be busting?
must they not be busting? 	must I not have busted?
must you not have busted?
must she not have busted?
must we not have busted?
must you not have busted?
must they not have busted? 	must I not have been busting?
must you not have been busting?
must she not have been busting?
must we not have been busting?
must you not have been busting?
must they not have been busting?