English verb conjugation
MUST CONFAB

Regular verb: confab - confabed - confabed

Affirmation

Simple form	V-ing form
I must confab you must confab he must confab we must confab you must confab they must confab	I must be confabing you must be confabing he must be confabing we must be confabing you must be confabing they must be confabing
Perfect	V-ing perfect
I must have confabed you must have confabed he must have confabed we must have confabed you must have confabed they must have confabed	I must have been confabing you must have been confabing he must have been confabing we must have been confabing you must have been confabing they must have been confabing

Negation

Simple form	V-ing form
I mustn't confab you mustn't confab he mustn't confab we mustn't confab you mustn't confab they mustn't confab	I mustn't be confabing you mustn't be confabing he mustn't be confabing we mustn't be confabing you mustn't be confabing they mustn't be confabing
Perfect	V-ing perfect
I mustn't have confabed you mustn't have confabed he mustn't have confabed we mustn't have confabed you mustn't have confabed they mustn't have confabed	I mustn't have been confabing you mustn't have been confabing he mustn't have been confabing we mustn't have been confabing you mustn't have been confabing they mustn't have been confabing

Interrogative form

Simple form	V-ing form
must I confab? must you confab? must he confab? must we confab? must you confab? must they confab?	must I be confabing? must you be confabing? must he be confabing? must we be confabing? must you be confabing? must they be confabing?
Perfect	V-ing perfect
must I have confabed? must you have confabed? must he have confabed? must we have confabed? must you have confabed? must they have confabed?	must I have been confabing? must you have been confabing? must he have been confabing? must we have been confabing? must you have been confabing? must they have been confabing?

Interro-negative form

Simple form	V-ing form
mustn't I confab? mustn't you confab? mustn't he confab? mustn't we confab? mustn't you confab? mustn't they confab?	mustn't I be confabing? mustn't you be confabing? mustn't he be confabing? mustn't we be confabing? mustn't you be confabing? mustn't they be confabing?
Perfect	V-ing perfect
mustn't I have confabed? mustn't you have confabed? mustn't he have confabed? mustn't we have confabed? mustn't you have confabed? mustn't they have confabed?	mustn't I have been confabing? mustn't you have been confabing? mustn't he have been confabing? mustn't we have been confabing? mustn't you have been confabing? mustn't they have been confabing?