must petition
Regular verb: petition - petitioned- petitioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must petition
you must petition
he must petition
we must petition
you must petition
they must petition 	I must be petitioning
you must be petitioning
he must be petitioning
we must be petitioning
you must be petitioning
they must be petitioning	I must have petitioned
you must have petitioned
he must have petitioned
we must have petitioned
you must have petitioned
they must have petitioned	I must have been petitioning
you must have been petitioning
he must have been petitioning
we must have been petitioning
you must have been petitioning
they must have been petitioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not petition
you must not petition
he must not petition
we must not petition
you must not petition
they must not petition 	I must not be petitioning
you must not be petitioning
he must not be petitioning
we must not be petitioning
you must not be petitioning
they must not be petitioning	I must not have petitioned
you must not have petitioned
he must not have petitioned
we must not have petitioned
you must not have petitioned
they must not have petitioned	I must not have been petitioning
you must not have been petitioning
he must not have been petitioning
we must not have been petitioning
you must not have been petitioning
they must not have been petitioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I petition?
must you petition?
must he petition?
must we petition?
must you petition?
must they petition? 	must I be petitioning?
must you be petitioning?
must he be petitioning?
must we be petitioning?
must you be petitioning?
must they be petitioning? 	must I have petitioned?
must you have petitioned?
must he have petitioned?
must we have petitioned?
must you have petitioned?
must they have petitioned? 	must I have been petitioning?
must you have been petitioning?
must he have been petitioning?
must we have been petitioning?
must you have been petitioning?
must they have been petitioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not petition?
must you not petition?
must he not petition?
must we not petition?
must you not petition?
must they not petition? 	must I not be petitioning?
must you not be petitioning?
must he not be petitioning?
must we not be petitioning?
must you not be petitioning?
must they not be petitioning? 	must I not have petitioned?
must you not have petitioned?
must he not have petitioned?
must we not have petitioned?
must you not have petitioned?
must they not have petitioned? 	must I not have been petitioning?
must you not have been petitioning?
must he not have been petitioning?
must we not have been petitioning?
must you not have been petitioning?
must they not have been petitioning?