English verb conjugation
MUST FABLE

Regular verb: fable - fabled - fabled

Affirmation

Simple form	V-ing form
I must fable you must fable he must fable we must fable you must fable they must fable	I must be fabling you must be fabling he must be fabling we must be fabling you must be fabling they must be fabling
Perfect	V-ing perfect
I must have fabled you must have fabled he must have fabled we must have fabled you must have fabled they must have fabled	I must have been fabling you must have been fabling he must have been fabling we must have been fabling you must have been fabling they must have been fabling

Negation

Simple form	V-ing form
I must not fable you must not fable he must not fable we must not fable you must not fable they must not fable	I must not be fabling you must not be fabling he must not be fabling we must not be fabling you must not be fabling they must not be fabling
Perfect	V-ing perfect
I must not have fabled you must not have fabled he must not have fabled we must not have fabled you must not have fabled they must not have fabled	I must not have been fabling you must not have been fabling he must not have been fabling we must not have been fabling you must not have been fabling they must not have been fabling

Interrogative form

Simple form	V-ing form
must I fable? must you fable? must he fable? must we fable? must you fable? must they fable?	must I be fabling? must you be fabling? must he be fabling? must we be fabling? must you be fabling? must they be fabling?
Perfect	V-ing perfect
must I have fabled? must you have fabled? must he have fabled? must we have fabled? must you have fabled? must they have fabled?	must I have been fabling? must you have been fabling? must he have been fabling? must we have been fabling? must you have been fabling? must they have been fabling?

Interro-negative form

Simple form	V-ing form
must I not fable? must you not fable? must he not fable? must we not fable? must you not fable? must they not fable?	must I not be fabling? must you not be fabling? must he not be fabling? must we not be fabling? must you not be fabling? must they not be fabling?
Perfect	V-ing perfect
must I not have fabled? must you not have fabled? must he not have fabled? must we not have fabled? must you not have fabled? must they not have fabled?	must I not have been fabling? must you not have been fabling? must he not have been fabling? must we not have been fabling? must you not have been fabling? must they not have been fabling?