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 must not cog you must not cog he must not cog we must not cog you must not cog they must not cog	I must not be coging you must not be coging he must not be coging we must not be coging you must not be coging they must not be coging
Perfect	V-ing perfect
I must not have coged you must not have coged he must not have coged we must not have coged you must not have coged they must not have coged	I must not have been coging you must not have been coging he must not have been coging we must not have been coging you must not have been coging they must not 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
must I not cog? must you not cog? must he not cog? must we not cog? must you not cog? must they not cog?	must I not be coging? must you not be coging? must he not be coging? must we not be coging? must you not be coging? must they not be coging?
Perfect	V-ing perfect
must I not have coged? must you not have coged? must he not have coged? must we not have coged? must you not have coged? must they not have coged?	must I not have been coging? must you not have been coging? must he not have been coging? must we not have been coging? must you not have been coging? must they not have been coging?