English verb conjugation
MUST PREPARE

Regular verb: prepare - prepared - prepared

Affirmation

Simple form	V-ing form
I must prepare you must prepare he must prepare we must prepare you must prepare they must prepare	I must be preparing you must be preparing he 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 he 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 he 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 mustn't prepare you mustn't prepare he mustn't prepare we mustn't prepare you mustn't prepare they mustn't prepare	I mustn't be preparing you mustn't be preparing he mustn't be preparing we mustn't be preparing you mustn't be preparing they mustn't be preparing
Perfect	V-ing perfect
I mustn't have prepared you mustn't have prepared he mustn't have prepared we mustn't have prepared you mustn't have prepared they mustn't have prepared	I mustn't have been preparing you mustn't have been preparing he mustn't have been preparing we mustn't have been preparing you mustn't have been preparing they mustn't have been preparing

Interrogative form

Simple form	V-ing form
must I prepare? must you prepare? must he prepare? must we prepare? must you prepare? must they prepare?	must I be preparing? must you be preparing? must he 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 he 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 he 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
mustn't I prepare? mustn't you prepare? mustn't he prepare? mustn't we prepare? mustn't you prepare? mustn't they prepare?	mustn't I be preparing? mustn't you be preparing? mustn't he be preparing? mustn't we be preparing? mustn't you be preparing? mustn't they be preparing?
Perfect	V-ing perfect
mustn't I have prepared? mustn't you have prepared? mustn't he have prepared? mustn't we have prepared? mustn't you have prepared? mustn't they have prepared?	mustn't I have been preparing? mustn't you have been preparing? mustn't he have been preparing? mustn't we have been preparing? mustn't you have been preparing? mustn't they have been preparing?