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