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 couldn't pinion you couldn't pinion he couldn't pinion we couldn't pinion you couldn't pinion they couldn't pinion	I couldn't be pinioning you couldn't be pinioning he couldn't be pinioning we couldn't be pinioning you couldn't be pinioning they couldn't be pinioning
Perfect	V-ing perfect
I couldn't have pinioned you couldn't have pinioned he couldn't have pinioned we couldn't have pinioned you couldn't have pinioned they couldn't have pinioned	I couldn't have been pinioning you couldn't have been pinioning he couldn't have been pinioning we couldn't have been pinioning you couldn't have been pinioning they couldn't 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
couldn't I pinion? couldn't you pinion? couldn't he pinion? couldn't we pinion? couldn't you pinion? couldn't they pinion?	couldn't I be pinioning? couldn't you be pinioning? couldn't he be pinioning? couldn't we be pinioning? couldn't you be pinioning? couldn't they be pinioning?
Perfect	V-ing perfect
couldn't I have pinioned? couldn't you have pinioned? couldn't he have pinioned? couldn't we have pinioned? couldn't you have pinioned? couldn't they have pinioned?	couldn't I have been pinioning? couldn't you have been pinioning? couldn't he have been pinioning? couldn't we have been pinioning? couldn't you have been pinioning? couldn't they have been pinioning?