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