I must strap you must strap she must strap we must strap you must strap they must strap
Forma con V-ing
I must be strapping you must be strapping she must be strapping we must be strapping you must be strapping they must be strapping
Perfecto
I must have strapped you must have strapped she must have strapped we must have strapped you must have strapped they must have strapped
Perfecto con V-ing
I must have been strapping you must have been strapping she must have been strapping we must have been strapping you must have been strapping they must have been strapping
Negación
Forma simple
I must not strap you must not strap she must not strap we must not strap you must not strap they must not strap
Forma con V-ing
I must not be strapping you must not be strapping she must not be strapping we must not be strapping you must not be strapping they must not be strapping
Perfecto
I must not have strapped you must not have strapped she must not have strapped we must not have strapped you must not have strapped they must not have strapped
Perfecto con V-ing
I must not have been strapping you must not have been strapping she must not have been strapping we must not have been strapping you must not have been strapping they must not have been strapping
Forma interrogativa
Forma simple
must I strap? must you strap? must she strap? must we strap? must you strap? must they strap?
Forma con V-ing
must I be strapping? must you be strapping? must she be strapping? must we be strapping? must you be strapping? must they be strapping?
Perfecto
must I have strapped? must you have strapped? must she have strapped? must we have strapped? must you have strapped? must they have strapped?
Perfecto con V-ing
must I have been strapping? must you have been strapping? must she have been strapping? must we have been strapping? must you have been strapping? must they have been strapping?
Forma interro-negativa
Forma simple
must I not strap? must you not strap? must she not strap? must we not strap? must you not strap? must they not strap?
Forma con V-ing
must I not be strapping? must you not be strapping? must she not be strapping? must we not be strapping? must you not be strapping? must they not be strapping?
Perfecto
must I not have strapped? must you not have strapped? must she not have strapped? must we not have strapped? must you not have strapped? must they not have strapped?
Perfecto con V-ing
must I not have been strapping? must you not have been strapping? must she not have been strapping? must we not have been strapping? must you not have been strapping? must they not have been strapping?