English verb conjugation
MUST PACK

Regular verb: pack - packed - packed

Affirmation

Simple form	V-ing form
I must pack you must pack he must pack we must pack you must pack they must pack	I must be packing you must be packing he must be packing we must be packing you must be packing they must be packing
Perfect	V-ing perfect
I must have packed you must have packed he must have packed we must have packed you must have packed they must have packed	I must have been packing you must have been packing he must have been packing we must have been packing you must have been packing they must have been packing

Negation

Simple form	V-ing form
I must not pack you must not pack he must not pack we must not pack you must not pack they must not pack	I must not be packing you must not be packing he must not be packing we must not be packing you must not be packing they must not be packing
Perfect	V-ing perfect
I must not have packed you must not have packed he must not have packed we must not have packed you must not have packed they must not have packed	I must not have been packing you must not have been packing he must not have been packing we must not have been packing you must not have been packing they must not have been packing

Interrogative form

Simple form	V-ing form
must I pack? must you pack? must he pack? must we pack? must you pack? must they pack?	must I be packing? must you be packing? must he be packing? must we be packing? must you be packing? must they be packing?
Perfect	V-ing perfect
must I have packed? must you have packed? must he have packed? must we have packed? must you have packed? must they have packed?	must I have been packing? must you have been packing? must he have been packing? must we have been packing? must you have been packing? must they have been packing?

Interro-negative form

Simple form	V-ing form
must I not pack? must you not pack? must he not pack? must we not pack? must you not pack? must they not pack?	must I not be packing? must you not be packing? must he not be packing? must we not be packing? must you not be packing? must they not be packing?
Perfect	V-ing perfect
must I not have packed? must you not have packed? must he not have packed? must we not have packed? must you not have packed? must they not have packed?	must I not have been packing? must you not have been packing? must he not have been packing? must we not have been packing? must you not have been packing? must they not have been packing?