must unbalance
Regular verb: unbalance - unbalanced- unbalanced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unbalance
you must unbalance
he must unbalance
we must unbalance
you must unbalance
they must unbalance 	I must be unbalancing
you must be unbalancing
he must be unbalancing
we must be unbalancing
you must be unbalancing
they must be unbalancing	I must have unbalanced
you must have unbalanced
he must have unbalanced
we must have unbalanced
you must have unbalanced
they must have unbalanced	I must have been unbalancing
you must have been unbalancing
he must have been unbalancing
we must have been unbalancing
you must have been unbalancing
they must have been unbalancing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unbalance
you mustn't unbalance
he mustn't unbalance
we mustn't unbalance
you mustn't unbalance
they mustn't unbalance 	I mustn't be unbalancing
you mustn't be unbalancing
he mustn't be unbalancing
we mustn't be unbalancing
you mustn't be unbalancing
they mustn't be unbalancing	I mustn't have unbalanced
you mustn't have unbalanced
he mustn't have unbalanced
we mustn't have unbalanced
you mustn't have unbalanced
they mustn't have unbalanced	I mustn't have been unbalancing
you mustn't have been unbalancing
he mustn't have been unbalancing
we mustn't have been unbalancing
you mustn't have been unbalancing
they mustn't have been unbalancing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unbalance?
must you unbalance?
must he unbalance?
must we unbalance?
must you unbalance?
must they unbalance? 	must I be unbalancing?
must you be unbalancing?
must he be unbalancing?
must we be unbalancing?
must you be unbalancing?
must they be unbalancing? 	must I have unbalanced?
must you have unbalanced?
must he have unbalanced?
must we have unbalanced?
must you have unbalanced?
must they have unbalanced? 	must I have been unbalancing?
must you have been unbalancing?
must he have been unbalancing?
must we have been unbalancing?
must you have been unbalancing?
must they have been unbalancing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unbalance?
mustn't you unbalance?
mustn't he unbalance?
mustn't we unbalance?
mustn't you unbalance?
mustn't they unbalance? 	mustn't I be unbalancing?
mustn't you be unbalancing?
mustn't he be unbalancing?
mustn't we be unbalancing?
mustn't you be unbalancing?
mustn't they be unbalancing? 	mustn't I have unbalanced?
mustn't you have unbalanced?
mustn't he have unbalanced?
mustn't we have unbalanced?
mustn't you have unbalanced?
mustn't they have unbalanced? 	mustn't I have been unbalancing?
mustn't you have been unbalancing?
mustn't he have been unbalancing?
mustn't we have been unbalancing?
mustn't you have been unbalancing?
mustn't they have been unbalancing?