English verb conjugation
COULD PETITION

Regular verb: petition - petitioned - petitioned

Affirmation

Simple form	V-ing form
I could petition you could petition she could petition we could petition you could petition they could petition	I could be petitioning you could be petitioning she could be petitioning we could be petitioning you could be petitioning they could be petitioning
Perfect	V-ing perfect
I could have petitioned you could have petitioned she could have petitioned we could have petitioned you could have petitioned they could have petitioned	I could have been petitioning you could have been petitioning she could have been petitioning we could have been petitioning you could have been petitioning they could have been petitioning

Negation

Simple form	V-ing form
I couldn't petition you couldn't petition she couldn't petition we couldn't petition you couldn't petition they couldn't petition	I couldn't be petitioning you couldn't be petitioning she couldn't be petitioning we couldn't be petitioning you couldn't be petitioning they couldn't be petitioning
Perfect	V-ing perfect
I couldn't have petitioned you couldn't have petitioned she couldn't have petitioned we couldn't have petitioned you couldn't have petitioned they couldn't have petitioned	I couldn't have been petitioning you couldn't have been petitioning she couldn't have been petitioning we couldn't have been petitioning you couldn't have been petitioning they couldn't have been petitioning

Interrogative form

Simple form	V-ing form
could I petition? could you petition? could she petition? could we petition? could you petition? could they petition?	could I be petitioning? could you be petitioning? could she be petitioning? could we be petitioning? could you be petitioning? could they be petitioning?
Perfect	V-ing perfect
could I have petitioned? could you have petitioned? could she have petitioned? could we have petitioned? could you have petitioned? could they have petitioned?	could I have been petitioning? could you have been petitioning? could she have been petitioning? could we have been petitioning? could you have been petitioning? could they have been petitioning?

Interro-negative form

Simple form	V-ing form
couldn't I petition? couldn't you petition? couldn't she petition? couldn't we petition? couldn't you petition? couldn't they petition?	couldn't I be petitioning? couldn't you be petitioning? couldn't she be petitioning? couldn't we be petitioning? couldn't you be petitioning? couldn't they be petitioning?
Perfect	V-ing perfect
couldn't I have petitioned? couldn't you have petitioned? couldn't she have petitioned? couldn't we have petitioned? couldn't you have petitioned? couldn't they have petitioned?	couldn't I have been petitioning? couldn't you have been petitioning? couldn't she have been petitioning? couldn't we have been petitioning? couldn't you have been petitioning? couldn't they have been petitioning?