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