I must prefocus you must prefocus she must prefocus we must prefocus you must prefocus they must prefocus
Forma con V-ing
I must be prefocusing you must be prefocusing she must be prefocusing we must be prefocusing you must be prefocusing they must be prefocusing
Perfecto
I must have prefocused you must have prefocused she must have prefocused we must have prefocused you must have prefocused they must have prefocused
Perfecto con V-ing
I must have been prefocusing you must have been prefocusing she must have been prefocusing we must have been prefocusing you must have been prefocusing they must have been prefocusing
Negación
Forma simple
I must not prefocus you must not prefocus she must not prefocus we must not prefocus you must not prefocus they must not prefocus
Forma con V-ing
I must not be prefocusing you must not be prefocusing she must not be prefocusing we must not be prefocusing you must not be prefocusing they must not be prefocusing
Perfecto
I must not have prefocused you must not have prefocused she must not have prefocused we must not have prefocused you must not have prefocused they must not have prefocused
Perfecto con V-ing
I must not have been prefocusing you must not have been prefocusing she must not have been prefocusing we must not have been prefocusing you must not have been prefocusing they must not have been prefocusing
Forma interrogativa
Forma simple
must I prefocus? must you prefocus? must she prefocus? must we prefocus? must you prefocus? must they prefocus?
Forma con V-ing
must I be prefocusing? must you be prefocusing? must she be prefocusing? must we be prefocusing? must you be prefocusing? must they be prefocusing?
Perfecto
must I have prefocused? must you have prefocused? must she have prefocused? must we have prefocused? must you have prefocused? must they have prefocused?
Perfecto con V-ing
must I have been prefocusing? must you have been prefocusing? must she have been prefocusing? must we have been prefocusing? must you have been prefocusing? must they have been prefocusing?
Forma interro-negativa
Forma simple
must I not prefocus? must you not prefocus? must she not prefocus? must we not prefocus? must you not prefocus? must they not prefocus?
Forma con V-ing
must I not be prefocusing? must you not be prefocusing? must she not be prefocusing? must we not be prefocusing? must you not be prefocusing? must they not be prefocusing?
Perfecto
must I not have prefocused? must you not have prefocused? must she not have prefocused? must we not have prefocused? must you not have prefocused? must they not have prefocused?
Perfecto con V-ing
must I not have been prefocusing? must you not have been prefocusing? must she not have been prefocusing? must we not have been prefocusing? must you not have been prefocusing? must they not have been prefocusing?