I could fable you could fable she could fable we could fable you could fable they could fable
V-ing form
I could be fabling you could be fabling she could be fabling we could be fabling you could be fabling they could be fabling
Perfect
I could have fabled you could have fabled she could have fabled we could have fabled you could have fabled they could have fabled
V-ing perfect
I could have been fabling you could have been fabling she could have been fabling we could have been fabling you could have been fabling they could have been fabling
Negation
Simple form
I could not fable you could not fable she could not fable we could not fable you could not fable they could not fable
V-ing form
I could not be fabling you could not be fabling she could not be fabling we could not be fabling you could not be fabling they could not be fabling
Perfect
I could not have fabled you could not have fabled she could not have fabled we could not have fabled you could not have fabled they could not have fabled
V-ing perfect
I could not have been fabling you could not have been fabling she could not have been fabling we could not have been fabling you could not have been fabling they could not have been fabling
Interrogative form
Simple form
could I fable? could you fable? could she fable? could we fable? could you fable? could they fable?
V-ing form
could I be fabling? could you be fabling? could she be fabling? could we be fabling? could you be fabling? could they be fabling?
Perfect
could I have fabled? could you have fabled? could she have fabled? could we have fabled? could you have fabled? could they have fabled?
V-ing perfect
could I have been fabling? could you have been fabling? could she have been fabling? could we have been fabling? could you have been fabling? could they have been fabling?
Interro-negative form
Simple form
could I not fable? could you not fable? could she not fable? could we not fable? could you not fable? could they not fable?
V-ing form
could I not be fabling? could you not be fabling? could she not be fabling? could we not be fabling? could you not be fabling? could they not be fabling?
Perfect
could I not have fabled? could you not have fabled? could she not have fabled? could we not have fabled? could you not have fabled? could they not have fabled?
V-ing perfect
could I not have been fabling? could you not have been fabling? could she not have been fabling? could we not have been fabling? could you not have been fabling? could they not have been fabling?