I must darken you must darken he must darken we must darken you must darken they must darken
Forma con V-ing
I must be darkening you must be darkening he must be darkening we must be darkening you must be darkening they must be darkening
Perfecto
I must have darkened you must have darkened he must have darkened we must have darkened you must have darkened they must have darkened
Perfecto con V-ing
I must have been darkening you must have been darkening he must have been darkening we must have been darkening you must have been darkening they must have been darkening
Negación
Forma simple
I must not darken you must not darken he must not darken we must not darken you must not darken they must not darken
Forma con V-ing
I must not be darkening you must not be darkening he must not be darkening we must not be darkening you must not be darkening they must not be darkening
Perfecto
I must not have darkened you must not have darkened he must not have darkened we must not have darkened you must not have darkened they must not have darkened
Perfecto con V-ing
I must not have been darkening you must not have been darkening he must not have been darkening we must not have been darkening you must not have been darkening they must not have been darkening
Forma interrogativa
Forma simple
must I darken? must you darken? must he darken? must we darken? must you darken? must they darken?
Forma con V-ing
must I be darkening? must you be darkening? must he be darkening? must we be darkening? must you be darkening? must they be darkening?
Perfecto
must I have darkened? must you have darkened? must he have darkened? must we have darkened? must you have darkened? must they have darkened?
Perfecto con V-ing
must I have been darkening? must you have been darkening? must he have been darkening? must we have been darkening? must you have been darkening? must they have been darkening?
Forma interro-negativa
Forma simple
must I not darken? must you not darken? must he not darken? must we not darken? must you not darken? must they not darken?
Forma con V-ing
must I not be darkening? must you not be darkening? must he not be darkening? must we not be darkening? must you not be darkening? must they not be darkening?
Perfecto
must I not have darkened? must you not have darkened? must he not have darkened? must we not have darkened? must you not have darkened? must they not have darkened?
Perfecto con V-ing
must I not have been darkening? must you not have been darkening? must he not have been darkening? must we not have been darkening? must you not have been darkening? must they not have been darkening?