English verb conjugation
MUST PONDER

Regular verb: ponder - pondered - pondered

Affirmation

Simple form	V-ing form
I must ponder you must ponder he must ponder we must ponder you must ponder they must ponder	I must be pondering you must be pondering he must be pondering we must be pondering you must be pondering they must be pondering
Perfect	V-ing perfect
I must have pondered you must have pondered he must have pondered we must have pondered you must have pondered they must have pondered	I must have been pondering you must have been pondering he must have been pondering we must have been pondering you must have been pondering they must have been pondering

Negation

Simple form	V-ing form
I mustn't ponder you mustn't ponder he mustn't ponder we mustn't ponder you mustn't ponder they mustn't ponder	I mustn't be pondering you mustn't be pondering he mustn't be pondering we mustn't be pondering you mustn't be pondering they mustn't be pondering
Perfect	V-ing perfect
I mustn't have pondered you mustn't have pondered he mustn't have pondered we mustn't have pondered you mustn't have pondered they mustn't have pondered	I mustn't have been pondering you mustn't have been pondering he mustn't have been pondering we mustn't have been pondering you mustn't have been pondering they mustn't have been pondering

Interrogative form

Simple form	V-ing form
must I ponder? must you ponder? must he ponder? must we ponder? must you ponder? must they ponder?	must I be pondering? must you be pondering? must he be pondering? must we be pondering? must you be pondering? must they be pondering?
Perfect	V-ing perfect
must I have pondered? must you have pondered? must he have pondered? must we have pondered? must you have pondered? must they have pondered?	must I have been pondering? must you have been pondering? must he have been pondering? must we have been pondering? must you have been pondering? must they have been pondering?

Interro-negative form

Simple form	V-ing form
mustn't I ponder? mustn't you ponder? mustn't he ponder? mustn't we ponder? mustn't you ponder? mustn't they ponder?	mustn't I be pondering? mustn't you be pondering? mustn't he be pondering? mustn't we be pondering? mustn't you be pondering? mustn't they be pondering?
Perfect	V-ing perfect
mustn't I have pondered? mustn't you have pondered? mustn't he have pondered? mustn't we have pondered? mustn't you have pondered? mustn't they have pondered?	mustn't I have been pondering? mustn't you have been pondering? mustn't he have been pondering? mustn't we have been pondering? mustn't you have been pondering? mustn't they have been pondering?