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