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