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 must not unhook
you must not unhook
he must not unhook
we must not unhook
you must not unhook
they must not unhook 	I must not be unhooking
you must not be unhooking
he must not be unhooking
we must not be unhooking
you must not be unhooking
they must not be unhooking	I must not have unhooked
you must not have unhooked
he must not have unhooked
we must not have unhooked
you must not have unhooked
they must not have unhooked	I must not have been unhooking
you must not have been unhooking
he must not have been unhooking
we must not have been unhooking
you must not have been unhooking
they must not 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 	
must I not unhook?
must you not unhook?
must he not unhook?
must we not unhook?
must you not unhook?
must they not unhook? 	must I not be unhooking?
must you not be unhooking?
must he not be unhooking?
must we not be unhooking?
must you not be unhooking?
must they not be unhooking? 	must I not have unhooked?
must you not have unhooked?
must he not have unhooked?
must we not have unhooked?
must you not have unhooked?
must they not have unhooked? 	must I not have been unhooking?
must you not have been unhooking?
must he not have been unhooking?
must we not have been unhooking?
must you not have been unhooking?
must they not have been unhooking?