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