English verb conjugation
MUST UNABLE

Regular verb: unable - unabled - unabled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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