must unshackle
Regular verb: unshackle - unshackled- unshackled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unshackle
you must unshackle
he must unshackle
we must unshackle
you must unshackle
they must unshackle 	I must be unshackling
you must be unshackling
he must be unshackling
we must be unshackling
you must be unshackling
they must be unshackling	I must have unshackled
you must have unshackled
he must have unshackled
we must have unshackled
you must have unshackled
they must have unshackled	I must have been unshackling
you must have been unshackling
he must have been unshackling
we must have been unshackling
you must have been unshackling
they must have been unshackling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unshackle
you mustn't unshackle
he mustn't unshackle
we mustn't unshackle
you mustn't unshackle
they mustn't unshackle 	I mustn't be unshackling
you mustn't be unshackling
he mustn't be unshackling
we mustn't be unshackling
you mustn't be unshackling
they mustn't be unshackling	I mustn't have unshackled
you mustn't have unshackled
he mustn't have unshackled
we mustn't have unshackled
you mustn't have unshackled
they mustn't have unshackled	I mustn't have been unshackling
you mustn't have been unshackling
he mustn't have been unshackling
we mustn't have been unshackling
you mustn't have been unshackling
they mustn't have been unshackling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unshackle?
must you unshackle?
must he unshackle?
must we unshackle?
must you unshackle?
must they unshackle? 	must I be unshackling?
must you be unshackling?
must he be unshackling?
must we be unshackling?
must you be unshackling?
must they be unshackling? 	must I have unshackled?
must you have unshackled?
must he have unshackled?
must we have unshackled?
must you have unshackled?
must they have unshackled? 	must I have been unshackling?
must you have been unshackling?
must he have been unshackling?
must we have been unshackling?
must you have been unshackling?
must they have been unshackling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unshackle?
mustn't you unshackle?
mustn't he unshackle?
mustn't we unshackle?
mustn't you unshackle?
mustn't they unshackle? 	mustn't I be unshackling?
mustn't you be unshackling?
mustn't he be unshackling?
mustn't we be unshackling?
mustn't you be unshackling?
mustn't they be unshackling? 	mustn't I have unshackled?
mustn't you have unshackled?
mustn't he have unshackled?
mustn't we have unshackled?
mustn't you have unshackled?
mustn't they have unshackled? 	mustn't I have been unshackling?
mustn't you have been unshackling?
mustn't he have been unshackling?
mustn't we have been unshackling?
mustn't you have been unshackling?
mustn't they have been unshackling?