I must prepare you must prepare she must prepare we must prepare you must prepare they must prepare
Forma con V-ing
I must be preparing you must be preparing she must be preparing we must be preparing you must be preparing they must be preparing
Perfecto
I must have prepared you must have prepared she must have prepared we must have prepared you must have prepared they must have prepared
Perfecto con V-ing
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
Negación
Forma simple
I mustn't prepare you mustn't prepare she mustn't prepare we mustn't prepare you mustn't prepare they mustn't prepare
Forma con V-ing
I mustn't be preparing you mustn't be preparing she mustn't be preparing we mustn't be preparing you mustn't be preparing they mustn't be preparing
Perfecto
I mustn't have prepared you mustn't have prepared she mustn't have prepared we mustn't have prepared you mustn't have prepared they mustn't have prepared
Perfecto con V-ing
I mustn't have been preparing you mustn't have been preparing she mustn't have been preparing we mustn't have been preparing you mustn't have been preparing they mustn't have been preparing
Forma interrogativa
Forma simple
must I prepare? must you prepare? must she prepare? must we prepare? must you prepare? must they prepare?
Forma con V-ing
must I be preparing? must you be preparing? must she be preparing? must we be preparing? must you be preparing? must they be preparing?
Perfecto
must I have prepared? must you have prepared? must she have prepared? must we have prepared? must you have prepared? must they have prepared?
Perfecto con V-ing
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?
Forma interro-negativa
Forma simple
mustn't I prepare? mustn't you prepare? mustn't she prepare? mustn't we prepare? mustn't you prepare? mustn't they prepare?
Forma con V-ing
mustn't I be preparing? mustn't you be preparing? mustn't she be preparing? mustn't we be preparing? mustn't you be preparing? mustn't they be preparing?
Perfecto
mustn't I have prepared? mustn't you have prepared? mustn't she have prepared? mustn't we have prepared? mustn't you have prepared? mustn't they have prepared?
Perfecto con V-ing
mustn't I have been preparing? mustn't you have been preparing? mustn't she have been preparing? mustn't we have been preparing? mustn't you have been preparing? mustn't they have been preparing?