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 mustn't ascribe you mustn't ascribe he mustn't ascribe we mustn't ascribe you mustn't ascribe they mustn't ascribe	I mustn't be ascribing you mustn't be ascribing he mustn't be ascribing we mustn't be ascribing you mustn't be ascribing they mustn't be ascribing
Perfect	V-ing perfect
I mustn't have ascribed you mustn't have ascribed he mustn't have ascribed we mustn't have ascribed you mustn't have ascribed they mustn't have ascribed	I mustn't have been ascribing you mustn't have been ascribing he mustn't have been ascribing we mustn't have been ascribing you mustn't have been ascribing they mustn't 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
mustn't I ascribe? mustn't you ascribe? mustn't he ascribe? mustn't we ascribe? mustn't you ascribe? mustn't they ascribe?	mustn't I be ascribing? mustn't you be ascribing? mustn't he be ascribing? mustn't we be ascribing? mustn't you be ascribing? mustn't they be ascribing?
Perfect	V-ing perfect
mustn't I have ascribed? mustn't you have ascribed? mustn't he have ascribed? mustn't we have ascribed? mustn't you have ascribed? mustn't they have ascribed?	mustn't I have been ascribing? mustn't you have been ascribing? mustn't he have been ascribing? mustn't we have been ascribing? mustn't you have been ascribing? mustn't they have been ascribing?