must overbalance
Regular verb: overbalance - overbalanced- overbalanced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must overbalance
you must overbalance
he must overbalance
we must overbalance
you must overbalance
they must overbalance 	I must be overbalancing
you must be overbalancing
he must be overbalancing
we must be overbalancing
you must be overbalancing
they must be overbalancing	I must have overbalanced
you must have overbalanced
he must have overbalanced
we must have overbalanced
you must have overbalanced
they must have overbalanced	I must have been overbalancing
you must have been overbalancing
he must have been overbalancing
we must have been overbalancing
you must have been overbalancing
they must have been overbalancing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't overbalance
you mustn't overbalance
he mustn't overbalance
we mustn't overbalance
you mustn't overbalance
they mustn't overbalance 	I mustn't be overbalancing
you mustn't be overbalancing
he mustn't be overbalancing
we mustn't be overbalancing
you mustn't be overbalancing
they mustn't be overbalancing	I mustn't have overbalanced
you mustn't have overbalanced
he mustn't have overbalanced
we mustn't have overbalanced
you mustn't have overbalanced
they mustn't have overbalanced	I mustn't have been overbalancing
you mustn't have been overbalancing
he mustn't have been overbalancing
we mustn't have been overbalancing
you mustn't have been overbalancing
they mustn't have been overbalancing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I overbalance?
must you overbalance?
must he overbalance?
must we overbalance?
must you overbalance?
must they overbalance? 	must I be overbalancing?
must you be overbalancing?
must he be overbalancing?
must we be overbalancing?
must you be overbalancing?
must they be overbalancing? 	must I have overbalanced?
must you have overbalanced?
must he have overbalanced?
must we have overbalanced?
must you have overbalanced?
must they have overbalanced? 	must I have been overbalancing?
must you have been overbalancing?
must he have been overbalancing?
must we have been overbalancing?
must you have been overbalancing?
must they have been overbalancing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I overbalance?
mustn't you overbalance?
mustn't he overbalance?
mustn't we overbalance?
mustn't you overbalance?
mustn't they overbalance? 	mustn't I be overbalancing?
mustn't you be overbalancing?
mustn't he be overbalancing?
mustn't we be overbalancing?
mustn't you be overbalancing?
mustn't they be overbalancing? 	mustn't I have overbalanced?
mustn't you have overbalanced?
mustn't he have overbalanced?
mustn't we have overbalanced?
mustn't you have overbalanced?
mustn't they have overbalanced? 	mustn't I have been overbalancing?
mustn't you have been overbalancing?
mustn't he have been overbalancing?
mustn't we have been overbalancing?
mustn't you have been overbalancing?
mustn't they have been overbalancing?