English verb conjugation
MUST PONG

Regular verb: pong - ponged - ponged

Affirmation

Simple form	V-ing form
I must pong you must pong she must pong we must pong you must pong they must pong	I must be ponging you must be ponging she must be ponging we must be ponging you must be ponging they must be ponging
Perfect	V-ing perfect
I must have ponged you must have ponged she must have ponged we must have ponged you must have ponged they must have ponged	I must have been ponging you must have been ponging she must have been ponging we must have been ponging you must have been ponging they must have been ponging

Negation

Simple form	V-ing form
I mustn't pong you mustn't pong she mustn't pong we mustn't pong you mustn't pong they mustn't pong	I mustn't be ponging you mustn't be ponging she mustn't be ponging we mustn't be ponging you mustn't be ponging they mustn't be ponging
Perfect	V-ing perfect
I mustn't have ponged you mustn't have ponged she mustn't have ponged we mustn't have ponged you mustn't have ponged they mustn't have ponged	I mustn't have been ponging you mustn't have been ponging she mustn't have been ponging we mustn't have been ponging you mustn't have been ponging they mustn't have been ponging

Interrogative form

Simple form	V-ing form
must I pong? must you pong? must she pong? must we pong? must you pong? must they pong?	must I be ponging? must you be ponging? must she be ponging? must we be ponging? must you be ponging? must they be ponging?
Perfect	V-ing perfect
must I have ponged? must you have ponged? must she have ponged? must we have ponged? must you have ponged? must they have ponged?	must I have been ponging? must you have been ponging? must she have been ponging? must we have been ponging? must you have been ponging? must they have been ponging?

Interro-negative form

Simple form	V-ing form
mustn't I pong? mustn't you pong? mustn't she pong? mustn't we pong? mustn't you pong? mustn't they pong?	mustn't I be ponging? mustn't you be ponging? mustn't she be ponging? mustn't we be ponging? mustn't you be ponging? mustn't they be ponging?
Perfect	V-ing perfect
mustn't I have ponged? mustn't you have ponged? mustn't she have ponged? mustn't we have ponged? mustn't you have ponged? mustn't they have ponged?	mustn't I have been ponging? mustn't you have been ponging? mustn't she have been ponging? mustn't we have been ponging? mustn't you have been ponging? mustn't they have been ponging?