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 couldn't unable you couldn't unable he couldn't unable we couldn't unable you couldn't unable they couldn't unable	I couldn't be unabling you couldn't be unabling he couldn't be unabling we couldn't be unabling you couldn't be unabling they couldn't be unabling
Perfect	V-ing perfect
I couldn't have unabled you couldn't have unabled he couldn't have unabled we couldn't have unabled you couldn't have unabled they couldn't have unabled	I couldn't have been unabling you couldn't have been unabling he couldn't have been unabling we couldn't have been unabling you couldn't have been unabling they couldn't 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
couldn't I unable? couldn't you unable? couldn't he unable? couldn't we unable? couldn't you unable? couldn't they unable?	couldn't I be unabling? couldn't you be unabling? couldn't he be unabling? couldn't we be unabling? couldn't you be unabling? couldn't they be unabling?
Perfect	V-ing perfect
couldn't I have unabled? couldn't you have unabled? couldn't he have unabled? couldn't we have unabled? couldn't you have unabled? couldn't they have unabled?	couldn't I have been unabling? couldn't you have been unabling? couldn't he have been unabling? couldn't we have been unabling? couldn't you have been unabling? couldn't they have been unabling?