must unmuzzle
Regular verb: unmuzzle - unmuzzled- unmuzzled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unmuzzle
you must unmuzzle
she must unmuzzle
we must unmuzzle
you must unmuzzle
they must unmuzzle 	I must be unmuzzling
you must be unmuzzling
she must be unmuzzling
we must be unmuzzling
you must be unmuzzling
they must be unmuzzling	I must have unmuzzled
you must have unmuzzled
she must have unmuzzled
we must have unmuzzled
you must have unmuzzled
they must have unmuzzled	I must have been unmuzzling
you must have been unmuzzling
she must have been unmuzzling
we must have been unmuzzling
you must have been unmuzzling
they must have been unmuzzling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unmuzzle
you mustn't unmuzzle
she mustn't unmuzzle
we mustn't unmuzzle
you mustn't unmuzzle
they mustn't unmuzzle 	I mustn't be unmuzzling
you mustn't be unmuzzling
she mustn't be unmuzzling
we mustn't be unmuzzling
you mustn't be unmuzzling
they mustn't be unmuzzling	I mustn't have unmuzzled
you mustn't have unmuzzled
she mustn't have unmuzzled
we mustn't have unmuzzled
you mustn't have unmuzzled
they mustn't have unmuzzled	I mustn't have been unmuzzling
you mustn't have been unmuzzling
she mustn't have been unmuzzling
we mustn't have been unmuzzling
you mustn't have been unmuzzling
they mustn't have been unmuzzling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unmuzzle?
must you unmuzzle?
must she unmuzzle?
must we unmuzzle?
must you unmuzzle?
must they unmuzzle? 	must I be unmuzzling?
must you be unmuzzling?
must she be unmuzzling?
must we be unmuzzling?
must you be unmuzzling?
must they be unmuzzling? 	must I have unmuzzled?
must you have unmuzzled?
must she have unmuzzled?
must we have unmuzzled?
must you have unmuzzled?
must they have unmuzzled? 	must I have been unmuzzling?
must you have been unmuzzling?
must she have been unmuzzling?
must we have been unmuzzling?
must you have been unmuzzling?
must they have been unmuzzling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unmuzzle?
mustn't you unmuzzle?
mustn't she unmuzzle?
mustn't we unmuzzle?
mustn't you unmuzzle?
mustn't they unmuzzle? 	mustn't I be unmuzzling?
mustn't you be unmuzzling?
mustn't she be unmuzzling?
mustn't we be unmuzzling?
mustn't you be unmuzzling?
mustn't they be unmuzzling? 	mustn't I have unmuzzled?
mustn't you have unmuzzled?
mustn't she have unmuzzled?
mustn't we have unmuzzled?
mustn't you have unmuzzled?
mustn't they have unmuzzled? 	mustn't I have been unmuzzling?
mustn't you have been unmuzzling?
mustn't she have been unmuzzling?
mustn't we have been unmuzzling?
mustn't you have been unmuzzling?
mustn't they have been unmuzzling?