I must unpack you must unpack she must unpack we must unpack you must unpack they must unpack
V-ing form
I must be unpacking you must be unpacking she must be unpacking we must be unpacking you must be unpacking they must be unpacking
Perfect
I must have unpacked you must have unpacked she 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 she must have been unpacking we must have been unpacking you must have been unpacking they must have been unpacking
Negation
Simple form
I must not unpack you must not unpack she must not unpack we must not unpack you must not unpack they must not unpack
V-ing form
I must not be unpacking you must not be unpacking she must not be unpacking we must not be unpacking you must not be unpacking they must not be unpacking
Perfect
I must not have unpacked you must not have unpacked she must not have unpacked we must not have unpacked you must not have unpacked they must not have unpacked
V-ing perfect
I must not have been unpacking you must not have been unpacking she must not have been unpacking we must not have been unpacking you must not have been unpacking they must not have been unpacking
Interrogative form
Simple form
must I unpack? must you unpack? must she unpack? must we unpack? must you unpack? must they unpack?
V-ing form
must I be unpacking? must you be unpacking? must she be unpacking? must we be unpacking? must you be unpacking? must they be unpacking?
Perfect
must I have unpacked? must you have unpacked? must she 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 she have been unpacking? must we have been unpacking? must you have been unpacking? must they have been unpacking?
Interro-negative form
Simple form
must I not unpack? must you not unpack? must she not unpack? must we not unpack? must you not unpack? must they not unpack?
V-ing form
must I not be unpacking? must you not be unpacking? must she not be unpacking? must we not be unpacking? must you not be unpacking? must they not be unpacking?
Perfect
must I not have unpacked? must you not have unpacked? must she not have unpacked? must we not have unpacked? must you not have unpacked? must they not have unpacked?
V-ing perfect
must I not have been unpacking? must you not have been unpacking? must she not have been unpacking? must we not have been unpacking? must you not have been unpacking? must they not have been unpacking?