I must fable you must fable she must fable we must fable you must fable they must fable
Forma con V-ing
I must be fabling you must be fabling she must be fabling we must be fabling you must be fabling they must be fabling
Perfecto
I must have fabled you must have fabled she must have fabled we must have fabled you must have fabled they must have fabled
Perfecto con V-ing
I must have been fabling you must have been fabling she must have been fabling we must have been fabling you must have been fabling they must have been fabling
Negación
Forma simple
I must not fable you must not fable she must not fable we must not fable you must not fable they must not fable
Forma con V-ing
I must not be fabling you must not be fabling she must not be fabling we must not be fabling you must not be fabling they must not be fabling
Perfecto
I must not have fabled you must not have fabled she must not have fabled we must not have fabled you must not have fabled they must not have fabled
Perfecto con V-ing
I must not have been fabling you must not have been fabling she must not have been fabling we must not have been fabling you must not have been fabling they must not have been fabling
Forma interrogativa
Forma simple
must I fable? must you fable? must she fable? must we fable? must you fable? must they fable?
Forma con V-ing
must I be fabling? must you be fabling? must she be fabling? must we be fabling? must you be fabling? must they be fabling?
Perfecto
must I have fabled? must you have fabled? must she have fabled? must we have fabled? must you have fabled? must they have fabled?
Perfecto con V-ing
must I have been fabling? must you have been fabling? must she have been fabling? must we have been fabling? must you have been fabling? must they have been fabling?
Forma interro-negativa
Forma simple
must I not fable? must you not fable? must she not fable? must we not fable? must you not fable? must they not fable?
Forma con V-ing
must I not be fabling? must you not be fabling? must she not be fabling? must we not be fabling? must you not be fabling? must they not be fabling?
Perfecto
must I not have fabled? must you not have fabled? must she not have fabled? must we not have fabled? must you not have fabled? must they not have fabled?
Perfecto con V-ing
must I not have been fabling? must you not have been fabling? must she not have been fabling? must we not have been fabling? must you not have been fabling? must they not have been fabling?