must unhook
Regular verb: unhook - unhooked- unhooked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unhook
you must unhook
he must unhook
we must unhook
you must unhook
they must unhook 	I must be unhooking
you must be unhooking
he must be unhooking
we must be unhooking
you must be unhooking
they must be unhooking	I must have unhooked
you must have unhooked
he must have unhooked
we must have unhooked
you must have unhooked
they must have unhooked	I must have been unhooking
you must have been unhooking
he must have been unhooking
we must have been unhooking
you must have been unhooking
they must have been unhooking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unhook
you mustn't unhook
he mustn't unhook
we mustn't unhook
you mustn't unhook
they mustn't unhook 	I mustn't be unhooking
you mustn't be unhooking
he mustn't be unhooking
we mustn't be unhooking
you mustn't be unhooking
they mustn't be unhooking	I mustn't have unhooked
you mustn't have unhooked
he mustn't have unhooked
we mustn't have unhooked
you mustn't have unhooked
they mustn't have unhooked	I mustn't have been unhooking
you mustn't have been unhooking
he mustn't have been unhooking
we mustn't have been unhooking
you mustn't have been unhooking
they mustn't have been unhooking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unhook?
must you unhook?
must he unhook?
must we unhook?
must you unhook?
must they unhook? 	must I be unhooking?
must you be unhooking?
must he be unhooking?
must we be unhooking?
must you be unhooking?
must they be unhooking? 	must I have unhooked?
must you have unhooked?
must he have unhooked?
must we have unhooked?
must you have unhooked?
must they have unhooked? 	must I have been unhooking?
must you have been unhooking?
must he have been unhooking?
must we have been unhooking?
must you have been unhooking?
must they have been unhooking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unhook?
mustn't you unhook?
mustn't he unhook?
mustn't we unhook?
mustn't you unhook?
mustn't they unhook? 	mustn't I be unhooking?
mustn't you be unhooking?
mustn't he be unhooking?
mustn't we be unhooking?
mustn't you be unhooking?
mustn't they be unhooking? 	mustn't I have unhooked?
mustn't you have unhooked?
mustn't he have unhooked?
mustn't we have unhooked?
mustn't you have unhooked?
mustn't they have unhooked? 	mustn't I have been unhooking?
mustn't you have been unhooking?
mustn't he have been unhooking?
mustn't we have been unhooking?
mustn't you have been unhooking?
mustn't they have been unhooking?