I'd be fabling you'd be fabling he'd be fabling we'd be fabling you'd be fabling they'd be fabling
Perfect
I should've fabled you should've fabled he should've fabled we should've fabled you should've fabled they should've fabled
V-ing perfect
I should've been fabling you should've been fabling he should've been fabling we should've been fabling you should've been fabling they should've been fabling
Negation
Simple form
I shouldn't fable you shouldn't fable he shouldn't fable we shouldn't fable you shouldn't fable they shouldn't fable
V-ing form
I shouldn't be fabling you shouldn't be fabling he shouldn't be fabling we shouldn't be fabling you shouldn't be fabling they shouldn't be fabling
Perfect
I shouldn't have fabled you shouldn't have fabled he shouldn't have fabled we shouldn't have fabled you shouldn't have fabled they shouldn't have fabled
V-ing perfect
I shouldn't have been fabling you shouldn't have been fabling he shouldn't have been fabling we shouldn't have been fabling you shouldn't have been fabling they shouldn't have been fabling
Interrogative form
Simple form
should I fable? should you fable? should he fable? should we fable? should you fable? should they fable?
V-ing form
should I be fabling? should you be fabling? should he be fabling? should we be fabling? should you be fabling? should they be fabling?
Perfect
should I have fabled? should you have fabled? should he have fabled? should we have fabled? should you have fabled? should they have fabled?
V-ing perfect
should I have been fabling? should you have been fabling? should he have been fabling? should we have been fabling? should you have been fabling? should they have been fabling?
Interro-negative form
Simple form
shouldn't I fable? shouldn't you fable? shouldn't he fable? shouldn't we fable? shouldn't you fable? shouldn't they fable?
V-ing form
shouldn't I be fabling? shouldn't you be fabling? shouldn't he be fabling? shouldn't we be fabling? shouldn't you be fabling? shouldn't they be fabling?
Perfect
shouldn't I have fabled? shouldn't you have fabled? shouldn't he have fabled? shouldn't we have fabled? shouldn't you have fabled? shouldn't they have fabled?
V-ing perfect
shouldn't I have been fabling? shouldn't you have been fabling? shouldn't he have been fabling? shouldn't we have been fabling? shouldn't you have been fabling? shouldn't they have been fabling?