I must search you must search she must search we must search you must search they must search
Forma con V-ing
I must be searching you must be searching she must be searching we must be searching you must be searching they must be searching
Perfecto
I must have searched you must have searched she 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 she must have been searching we must have been searching you must have been searching they must have been searching
Negación
Forma simple
I must not search you must not search she must not search we must not search you must not search they must not search
Forma con V-ing
I must not be searching you must not be searching she must not be searching we must not be searching you must not be searching they must not be searching
Perfecto
I must not have searched you must not have searched she must not have searched we must not have searched you must not have searched they must not have searched
Perfecto con V-ing
I must not have been searching you must not have been searching she must not have been searching we must not have been searching you must not have been searching they must not have been searching
Forma interrogativa
Forma simple
must I search? must you search? must she search? must we search? must you search? must they search?
Forma con V-ing
must I be searching? must you be searching? must she be searching? must we be searching? must you be searching? must they be searching?
Perfecto
must I have searched? must you have searched? must she 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 she have been searching? must we have been searching? must you have been searching? must they have been searching?
Forma interro-negativa
Forma simple
must I not search? must you not search? must she not search? must we not search? must you not search? must they not search?
Forma con V-ing
must I not be searching? must you not be searching? must she not be searching? must we not be searching? must you not be searching? must they not be searching?
Perfecto
must I not have searched? must you not have searched? must she not have searched? must we not have searched? must you not have searched? must they not have searched?
Perfecto con V-ing
must I not have been searching? must you not have been searching? must she not have been searching? must we not have been searching? must you not have been searching? must they not have been searching?