must unpack
Regular verb: unpack - unpacked- unpacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unpack
you must unpack
she must unpack
we must unpack
you must unpack
they must unpack 	I must be unpacking
you must be unpacking
she must be unpacking
we must be unpacking
you must be unpacking
they must be unpacking	I must have unpacked
you must have unpacked
she must have unpacked
we must have unpacked
you must have unpacked
they must have unpacked	I must have been unpacking
you must have been unpacking
she must have been unpacking
we must have been unpacking
you must have been unpacking
they must have been unpacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unpack
you mustn't unpack
she mustn't unpack
we mustn't unpack
you mustn't unpack
they mustn't unpack 	I mustn't be unpacking
you mustn't be unpacking
she mustn't be unpacking
we mustn't be unpacking
you mustn't be unpacking
they mustn't be unpacking	I mustn't have unpacked
you mustn't have unpacked
she mustn't have unpacked
we mustn't have unpacked
you mustn't have unpacked
they mustn't have unpacked	I mustn't have been unpacking
you mustn't have been unpacking
she mustn't have been unpacking
we mustn't have been unpacking
you mustn't have been unpacking
they mustn't have been unpacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unpack?
must you unpack?
must she unpack?
must we unpack?
must you unpack?
must they unpack? 	must I be unpacking?
must you be unpacking?
must she be unpacking?
must we be unpacking?
must you be unpacking?
must they be unpacking? 	must I have unpacked?
must you have unpacked?
must she have unpacked?
must we have unpacked?
must you have unpacked?
must they have unpacked? 	must I have been unpacking?
must you have been unpacking?
must she have been unpacking?
must we have been unpacking?
must you have been unpacking?
must they have been unpacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unpack?
mustn't you unpack?
mustn't she unpack?
mustn't we unpack?
mustn't you unpack?
mustn't they unpack? 	mustn't I be unpacking?
mustn't you be unpacking?
mustn't she be unpacking?
mustn't we be unpacking?
mustn't you be unpacking?
mustn't they be unpacking? 	mustn't I have unpacked?
mustn't you have unpacked?
mustn't she have unpacked?
mustn't we have unpacked?
mustn't you have unpacked?
mustn't they have unpacked? 	mustn't I have been unpacking?
mustn't you have been unpacking?
mustn't she have been unpacking?
mustn't we have been unpacking?
mustn't you have been unpacking?
mustn't they have been unpacking?