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