English verb conjugation
MUST COG

Regular verb: cog - coged - coged

Affirmation

Simple form	V-ing form
I must cog you must cog she must cog we must cog you must cog they must cog	I must be coging you must be coging she 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 she 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 she 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 she 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 she 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 she 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 she 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 she cog? must we cog? must you cog? must they cog?	must I be coging? must you be coging? must she 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 she 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 she 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 she 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 she 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 she 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 she have been coging? mustn't we have been coging? mustn't you have been coging? mustn't they have been coging?