English verb conjugation
MUST PREPARE

Regular verb: prepare - prepared - prepared

Affirmation

Simple form	V-ing form
I must prepare you must prepare she must prepare we must prepare you must prepare they must prepare	I must be preparing you must be preparing she must be preparing we must be preparing you must be preparing they must be preparing
Perfect	V-ing perfect
I must have prepared you must have prepared she must have prepared we must have prepared you must have prepared they must have prepared	I must have been preparing you must have been preparing she must have been preparing we must have been preparing you must have been preparing they must have been preparing

Negation

Simple form	V-ing form
I must not prepare you must not prepare she must not prepare we must not prepare you must not prepare they must not prepare	I must not be preparing you must not be preparing she must not be preparing we must not be preparing you must not be preparing they must not be preparing
Perfect	V-ing perfect
I must not have prepared you must not have prepared she must not have prepared we must not have prepared you must not have prepared they must not have prepared	I must not have been preparing you must not have been preparing she must not have been preparing we must not have been preparing you must not have been preparing they must not have been preparing

Interrogative form

Simple form	V-ing form
must I prepare? must you prepare? must she prepare? must we prepare? must you prepare? must they prepare?	must I be preparing? must you be preparing? must she be preparing? must we be preparing? must you be preparing? must they be preparing?
Perfect	V-ing perfect
must I have prepared? must you have prepared? must she have prepared? must we have prepared? must you have prepared? must they have prepared?	must I have been preparing? must you have been preparing? must she have been preparing? must we have been preparing? must you have been preparing? must they have been preparing?

Interro-negative form

Simple form	V-ing form
must I not prepare? must you not prepare? must she not prepare? must we not prepare? must you not prepare? must they not prepare?	must I not be preparing? must you not be preparing? must she not be preparing? must we not be preparing? must you not be preparing? must they not be preparing?
Perfect	V-ing perfect
must I not have prepared? must you not have prepared? must she not have prepared? must we not have prepared? must you not have prepared? must they not have prepared?	must I not have been preparing? must you not have been preparing? must she not have been preparing? must we not have been preparing? must you not have been preparing? must they not have been preparing?