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