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