I must cram you must cram he must cram we must cram you must cram they must cram
Forma con V-ing
I must be cramming you must be cramming he must be cramming we must be cramming you must be cramming they must be cramming
Perfecto
I must have crammed you must have crammed he must have crammed we must have crammed you must have crammed they must have crammed
Perfecto con V-ing
I must have been cramming you must have been cramming he must have been cramming we must have been cramming you must have been cramming they must have been cramming
Negación
Forma simple
I mustn't cram you mustn't cram he mustn't cram we mustn't cram you mustn't cram they mustn't cram
Forma con V-ing
I mustn't be cramming you mustn't be cramming he mustn't be cramming we mustn't be cramming you mustn't be cramming they mustn't be cramming
Perfecto
I mustn't have crammed you mustn't have crammed he mustn't have crammed we mustn't have crammed you mustn't have crammed they mustn't have crammed
Perfecto con V-ing
I mustn't have been cramming you mustn't have been cramming he mustn't have been cramming we mustn't have been cramming you mustn't have been cramming they mustn't have been cramming
Forma interrogativa
Forma simple
must I cram? must you cram? must he cram? must we cram? must you cram? must they cram?
Forma con V-ing
must I be cramming? must you be cramming? must he be cramming? must we be cramming? must you be cramming? must they be cramming?
Perfecto
must I have crammed? must you have crammed? must he have crammed? must we have crammed? must you have crammed? must they have crammed?
Perfecto con V-ing
must I have been cramming? must you have been cramming? must he have been cramming? must we have been cramming? must you have been cramming? must they have been cramming?
Forma interro-negativa
Forma simple
mustn't I cram? mustn't you cram? mustn't he cram? mustn't we cram? mustn't you cram? mustn't they cram?
Forma con V-ing
mustn't I be cramming? mustn't you be cramming? mustn't he be cramming? mustn't we be cramming? mustn't you be cramming? mustn't they be cramming?
Perfecto
mustn't I have crammed? mustn't you have crammed? mustn't he have crammed? mustn't we have crammed? mustn't you have crammed? mustn't they have crammed?
Perfecto con V-ing
mustn't I have been cramming? mustn't you have been cramming? mustn't he have been cramming? mustn't we have been cramming? mustn't you have been cramming? mustn't they have been cramming?