I must muss you must muss she must muss we must muss you must muss they must muss
Forma con V-ing
I must be mussing you must be mussing she must be mussing we must be mussing you must be mussing they must be mussing
Perfecto
I must have mussed you must have mussed she must have mussed we must have mussed you must have mussed they must have mussed
Perfecto con V-ing
I must have been mussing you must have been mussing she must have been mussing we must have been mussing you must have been mussing they must have been mussing
Negación
Forma simple
I must not muss you must not muss she must not muss we must not muss you must not muss they must not muss
Forma con V-ing
I must not be mussing you must not be mussing she must not be mussing we must not be mussing you must not be mussing they must not be mussing
Perfecto
I must not have mussed you must not have mussed she must not have mussed we must not have mussed you must not have mussed they must not have mussed
Perfecto con V-ing
I must not have been mussing you must not have been mussing she must not have been mussing we must not have been mussing you must not have been mussing they must not have been mussing
Forma interrogativa
Forma simple
must I muss? must you muss? must she muss? must we muss? must you muss? must they muss?
Forma con V-ing
must I be mussing? must you be mussing? must she be mussing? must we be mussing? must you be mussing? must they be mussing?
Perfecto
must I have mussed? must you have mussed? must she have mussed? must we have mussed? must you have mussed? must they have mussed?
Perfecto con V-ing
must I have been mussing? must you have been mussing? must she have been mussing? must we have been mussing? must you have been mussing? must they have been mussing?
Forma interro-negativa
Forma simple
must I not muss? must you not muss? must she not muss? must we not muss? must you not muss? must they not muss?
Forma con V-ing
must I not be mussing? must you not be mussing? must she not be mussing? must we not be mussing? must you not be mussing? must they not be mussing?
Perfecto
must I not have mussed? must you not have mussed? must she not have mussed? must we not have mussed? must you not have mussed? must they not have mussed?
Perfecto con V-ing
must I not have been mussing? must you not have been mussing? must she not have been mussing? must we not have been mussing? must you not have been mussing? must they not have been mussing?