I must repack you must repack she must repack we must repack you must repack they must repack
V-ing form
I must be repacking you must be repacking she must be repacking we must be repacking you must be repacking they must be repacking
Perfect
I must have repacked you must have repacked she must have repacked we must have repacked you must have repacked they must have repacked
V-ing perfect
I must have been repacking you must have been repacking she must have been repacking we must have been repacking you must have been repacking they must have been repacking
Negation
Simple form
I must not repack you must not repack she must not repack we must not repack you must not repack they must not repack
V-ing form
I must not be repacking you must not be repacking she must not be repacking we must not be repacking you must not be repacking they must not be repacking
Perfect
I must not have repacked you must not have repacked she must not have repacked we must not have repacked you must not have repacked they must not have repacked
V-ing perfect
I must not have been repacking you must not have been repacking she must not have been repacking we must not have been repacking you must not have been repacking they must not have been repacking
Interrogative form
Simple form
must I repack? must you repack? must she repack? must we repack? must you repack? must they repack?
V-ing form
must I be repacking? must you be repacking? must she be repacking? must we be repacking? must you be repacking? must they be repacking?
Perfect
must I have repacked? must you have repacked? must she have repacked? must we have repacked? must you have repacked? must they have repacked?
V-ing perfect
must I have been repacking? must you have been repacking? must she have been repacking? must we have been repacking? must you have been repacking? must they have been repacking?
Interro-negative form
Simple form
must I not repack? must you not repack? must she not repack? must we not repack? must you not repack? must they not repack?
V-ing form
must I not be repacking? must you not be repacking? must she not be repacking? must we not be repacking? must you not be repacking? must they not be repacking?
Perfect
must I not have repacked? must you not have repacked? must she not have repacked? must we not have repacked? must you not have repacked? must they not have repacked?
V-ing perfect
must I not have been repacking? must you not have been repacking? must she not have been repacking? must we not have been repacking? must you not have been repacking? must they not have been repacking?