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