English verb conjugation
COULD FABLE

Regular verb: fable - fabled - fabled

Affirmation

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

Negation

Simple form	V-ing form
I couldn't fable you couldn't fable he couldn't fable we couldn't fable you couldn't fable they couldn't fable	I couldn't be fabling you couldn't be fabling he couldn't be fabling we couldn't be fabling you couldn't be fabling they couldn't be fabling
Perfect	V-ing perfect
I couldn't have fabled you couldn't have fabled he couldn't have fabled we couldn't have fabled you couldn't have fabled they couldn't have fabled	I couldn't have been fabling you couldn't have been fabling he couldn't have been fabling we couldn't have been fabling you couldn't have been fabling they couldn't have been fabling

Interrogative form

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

Interro-negative form

Simple form	V-ing form
couldn't I fable? couldn't you fable? couldn't he fable? couldn't we fable? couldn't you fable? couldn't they fable?	couldn't I be fabling? couldn't you be fabling? couldn't he be fabling? couldn't we be fabling? couldn't you be fabling? couldn't they be fabling?
Perfect	V-ing perfect
couldn't I have fabled? couldn't you have fabled? couldn't he have fabled? couldn't we have fabled? couldn't you have fabled? couldn't they have fabled?	couldn't I have been fabling? couldn't you have been fabling? couldn't he have been fabling? couldn't we have been fabling? couldn't you have been fabling? couldn't they have been fabling?