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