English verb conjugation
COULD UNABLE

Regular verb: unable - unabled - unabled

Affirmation

Simple form	V-ing form
I could unable you could unable he could unable we could unable you could unable they could unable	I could be unabling you could be unabling he could be unabling we could be unabling you could be unabling they could be unabling
Perfect	V-ing perfect
I could have unabled you could have unabled he could have unabled we could have unabled you could have unabled they could have unabled	I could have been unabling you could have been unabling he could have been unabling we could have been unabling you could have been unabling they could have been unabling

Negation

Simple form	V-ing form
I could not unable you could not unable he could not unable we could not unable you could not unable they could not unable	I could not be unabling you could not be unabling he could not be unabling we could not be unabling you could not be unabling they could not be unabling
Perfect	V-ing perfect
I could not have unabled you could not have unabled he could not have unabled we could not have unabled you could not have unabled they could not have unabled	I could not have been unabling you could not have been unabling he could not have been unabling we could not have been unabling you could not have been unabling they could not have been unabling

Interrogative form

Simple form	V-ing form
could I unable? could you unable? could he unable? could we unable? could you unable? could they unable?	could I be unabling? could you be unabling? could he be unabling? could we be unabling? could you be unabling? could they be unabling?
Perfect	V-ing perfect
could I have unabled? could you have unabled? could he have unabled? could we have unabled? could you have unabled? could they have unabled?	could I have been unabling? could you have been unabling? could he have been unabling? could we have been unabling? could you have been unabling? could they have been unabling?

Interro-negative form

Simple form	V-ing form
could I not unable? could you not unable? could he not unable? could we not unable? could you not unable? could they not unable?	could I not be unabling? could you not be unabling? could he not be unabling? could we not be unabling? could you not be unabling? could they not be unabling?
Perfect	V-ing perfect
could I not have unabled? could you not have unabled? could he not have unabled? could we not have unabled? could you not have unabled? could they not have unabled?	could I not have been unabling? could you not have been unabling? could he not have been unabling? could we not have been unabling? could you not have been unabling? could they not have been unabling?