must better
Regular verb: better - bettered- bettered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must better
you must better
she must better
we must better
you must better
they must better 	I must be bettering
you must be bettering
she must be bettering
we must be bettering
you must be bettering
they must be bettering	I must have bettered
you must have bettered
she must have bettered
we must have bettered
you must have bettered
they must have bettered	I must have been bettering
you must have been bettering
she must have been bettering
we must have been bettering
you must have been bettering
they must have been bettering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not better
you must not better
she must not better
we must not better
you must not better
they must not better 	I must not be bettering
you must not be bettering
she must not be bettering
we must not be bettering
you must not be bettering
they must not be bettering	I must not have bettered
you must not have bettered
she must not have bettered
we must not have bettered
you must not have bettered
they must not have bettered	I must not have been bettering
you must not have been bettering
she must not have been bettering
we must not have been bettering
you must not have been bettering
they must not have been bettering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I better?
must you better?
must she better?
must we better?
must you better?
must they better? 	must I be bettering?
must you be bettering?
must she be bettering?
must we be bettering?
must you be bettering?
must they be bettering? 	must I have bettered?
must you have bettered?
must she have bettered?
must we have bettered?
must you have bettered?
must they have bettered? 	must I have been bettering?
must you have been bettering?
must she have been bettering?
must we have been bettering?
must you have been bettering?
must they have been bettering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not better?
must you not better?
must she not better?
must we not better?
must you not better?
must they not better? 	must I not be bettering?
must you not be bettering?
must she not be bettering?
must we not be bettering?
must you not be bettering?
must they not be bettering? 	must I not have bettered?
must you not have bettered?
must she not have bettered?
must we not have bettered?
must you not have bettered?
must they not have bettered? 	must I not have been bettering?
must you not have been bettering?
must she not have been bettering?
must we not have been bettering?
must you not have been bettering?
must they not have been bettering?