English verb conjugation
MUST ASCRIBE

Regular verb: ascribe - ascribed - ascribed

Affirmation

Simple form	V-ing form
I must ascribe you must ascribe he must ascribe we must ascribe you must ascribe they must ascribe	I must be ascribing you must be ascribing he must be ascribing we must be ascribing you must be ascribing they must be ascribing
Perfect	V-ing perfect
I must have ascribed you must have ascribed he must have ascribed we must have ascribed you must have ascribed they must have ascribed	I must have been ascribing you must have been ascribing he must have been ascribing we must have been ascribing you must have been ascribing they must have been ascribing

Negation

Simple form	V-ing form
I must not ascribe you must not ascribe he must not ascribe we must not ascribe you must not ascribe they must not ascribe	I must not be ascribing you must not be ascribing he must not be ascribing we must not be ascribing you must not be ascribing they must not be ascribing
Perfect	V-ing perfect
I must not have ascribed you must not have ascribed he must not have ascribed we must not have ascribed you must not have ascribed they must not have ascribed	I must not have been ascribing you must not have been ascribing he must not have been ascribing we must not have been ascribing you must not have been ascribing they must not have been ascribing

Interrogative form

Simple form	V-ing form
must I ascribe? must you ascribe? must he ascribe? must we ascribe? must you ascribe? must they ascribe?	must I be ascribing? must you be ascribing? must he be ascribing? must we be ascribing? must you be ascribing? must they be ascribing?
Perfect	V-ing perfect
must I have ascribed? must you have ascribed? must he have ascribed? must we have ascribed? must you have ascribed? must they have ascribed?	must I have been ascribing? must you have been ascribing? must he have been ascribing? must we have been ascribing? must you have been ascribing? must they have been ascribing?

Interro-negative form

Simple form	V-ing form
must I not ascribe? must you not ascribe? must he not ascribe? must we not ascribe? must you not ascribe? must they not ascribe?	must I not be ascribing? must you not be ascribing? must he not be ascribing? must we not be ascribing? must you not be ascribing? must they not be ascribing?
Perfect	V-ing perfect
must I not have ascribed? must you not have ascribed? must he not have ascribed? must we not have ascribed? must you not have ascribed? must they not have ascribed?	must I not have been ascribing? must you not have been ascribing? must he not have been ascribing? must we not have been ascribing? must you not have been ascribing? must they not have been ascribing?