English verb conjugation
MUST COG

Regular verb: cog - coged - coged

Affirmation

Simple form	V-ing form
I must cog you must cog he must cog we must cog you must cog they must cog	I must be coging you must be coging he must be coging we must be coging you must be coging they must be coging
Perfect	V-ing perfect
I must have coged you must have coged he must have coged we must have coged you must have coged they must have coged	I must have been coging you must have been coging he must have been coging we must have been coging you must have been coging they must have been coging

Negation

Simple form	V-ing form
I mustn't cog you mustn't cog he mustn't cog we mustn't cog you mustn't cog they mustn't cog	I mustn't be coging you mustn't be coging he mustn't be coging we mustn't be coging you mustn't be coging they mustn't be coging
Perfect	V-ing perfect
I mustn't have coged you mustn't have coged he mustn't have coged we mustn't have coged you mustn't have coged they mustn't have coged	I mustn't have been coging you mustn't have been coging he mustn't have been coging we mustn't have been coging you mustn't have been coging they mustn't have been coging

Interrogative form

Simple form	V-ing form
must I cog? must you cog? must he cog? must we cog? must you cog? must they cog?	must I be coging? must you be coging? must he be coging? must we be coging? must you be coging? must they be coging?
Perfect	V-ing perfect
must I have coged? must you have coged? must he have coged? must we have coged? must you have coged? must they have coged?	must I have been coging? must you have been coging? must he have been coging? must we have been coging? must you have been coging? must they have been coging?

Interro-negative form

Simple form	V-ing form
mustn't I cog? mustn't you cog? mustn't he cog? mustn't we cog? mustn't you cog? mustn't they cog?	mustn't I be coging? mustn't you be coging? mustn't he be coging? mustn't we be coging? mustn't you be coging? mustn't they be coging?
Perfect	V-ing perfect
mustn't I have coged? mustn't you have coged? mustn't he have coged? mustn't we have coged? mustn't you have coged? mustn't they have coged?	mustn't I have been coging? mustn't you have been coging? mustn't he have been coging? mustn't we have been coging? mustn't you have been coging? mustn't they have been coging?