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