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