must unhook
Regular verb: unhook - unhooked- unhooked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unhook
you must unhook
she must unhook
we must unhook
you must unhook
they must unhook 	I must be unhooking
you must be unhooking
she must be unhooking
we must be unhooking
you must be unhooking
they must be unhooking	I must have unhooked
you must have unhooked
she 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
she 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
she 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
she 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
she 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
she 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 she unhook?
must we unhook?
must you unhook?
must they unhook? 	must I be unhooking?
must you be unhooking?
must she be unhooking?
must we be unhooking?
must you be unhooking?
must they be unhooking? 	must I have unhooked?
must you have unhooked?
must she 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 she 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 she 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 she 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 she 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 she have been unhooking?
mustn't we have been unhooking?
mustn't you have been unhooking?
mustn't they have been unhooking?