English verb conjugation
COULD PINION

Regular verb: pinion - pinioned - pinioned

Affirmation

Simple form	V-ing form
I could pinion you could pinion he could pinion we could pinion you could pinion they could pinion	I could be pinioning you could be pinioning he could be pinioning we could be pinioning you could be pinioning they could be pinioning
Perfect	V-ing perfect
I could have pinioned you could have pinioned he could have pinioned we could have pinioned you could have pinioned they could have pinioned	I could have been pinioning you could have been pinioning he could have been pinioning we could have been pinioning you could have been pinioning they could have been pinioning

Negation

Simple form	V-ing form
I could not pinion you could not pinion he could not pinion we could not pinion you could not pinion they could not pinion	I could not be pinioning you could not be pinioning he could not be pinioning we could not be pinioning you could not be pinioning they could not be pinioning
Perfect	V-ing perfect
I could not have pinioned you could not have pinioned he could not have pinioned we could not have pinioned you could not have pinioned they could not have pinioned	I could not have been pinioning you could not have been pinioning he could not have been pinioning we could not have been pinioning you could not have been pinioning they could not have been pinioning

Interrogative form

Simple form	V-ing form
could I pinion? could you pinion? could he pinion? could we pinion? could you pinion? could they pinion?	could I be pinioning? could you be pinioning? could he be pinioning? could we be pinioning? could you be pinioning? could they be pinioning?
Perfect	V-ing perfect
could I have pinioned? could you have pinioned? could he have pinioned? could we have pinioned? could you have pinioned? could they have pinioned?	could I have been pinioning? could you have been pinioning? could he have been pinioning? could we have been pinioning? could you have been pinioning? could they have been pinioning?

Interro-negative form

Simple form	V-ing form
could I not pinion? could you not pinion? could he not pinion? could we not pinion? could you not pinion? could they not pinion?	could I not be pinioning? could you not be pinioning? could he not be pinioning? could we not be pinioning? could you not be pinioning? could they not be pinioning?
Perfect	V-ing perfect
could I not have pinioned? could you not have pinioned? could he not have pinioned? could we not have pinioned? could you not have pinioned? could they not have pinioned?	could I not have been pinioning? could you not have been pinioning? could he not have been pinioning? could we not have been pinioning? could you not have been pinioning? could they not have been pinioning?