must unfix
Regular verb: unfix - unfixed- unfixed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unfix
you must unfix
she must unfix
we must unfix
you must unfix
they must unfix 	I must be unfixing
you must be unfixing
she must be unfixing
we must be unfixing
you must be unfixing
they must be unfixing	I must have unfixed
you must have unfixed
she must have unfixed
we must have unfixed
you must have unfixed
they must have unfixed	I must have been unfixing
you must have been unfixing
she must have been unfixing
we must have been unfixing
you must have been unfixing
they must have been unfixing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not unfix
you must not unfix
she must not unfix
we must not unfix
you must not unfix
they must not unfix 	I must not be unfixing
you must not be unfixing
she must not be unfixing
we must not be unfixing
you must not be unfixing
they must not be unfixing	I must not have unfixed
you must not have unfixed
she must not have unfixed
we must not have unfixed
you must not have unfixed
they must not have unfixed	I must not have been unfixing
you must not have been unfixing
she must not have been unfixing
we must not have been unfixing
you must not have been unfixing
they must not have been unfixing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unfix?
must you unfix?
must she unfix?
must we unfix?
must you unfix?
must they unfix? 	must I be unfixing?
must you be unfixing?
must she be unfixing?
must we be unfixing?
must you be unfixing?
must they be unfixing? 	must I have unfixed?
must you have unfixed?
must she have unfixed?
must we have unfixed?
must you have unfixed?
must they have unfixed? 	must I have been unfixing?
must you have been unfixing?
must she have been unfixing?
must we have been unfixing?
must you have been unfixing?
must they have been unfixing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not unfix?
must you not unfix?
must she not unfix?
must we not unfix?
must you not unfix?
must they not unfix? 	must I not be unfixing?
must you not be unfixing?
must she not be unfixing?
must we not be unfixing?
must you not be unfixing?
must they not be unfixing? 	must I not have unfixed?
must you not have unfixed?
must she not have unfixed?
must we not have unfixed?
must you not have unfixed?
must they not have unfixed? 	must I not have been unfixing?
must you not have been unfixing?
must she not have been unfixing?
must we not have been unfixing?
must you not have been unfixing?
must they not have been unfixing?