English verb conjugation
COULD VOLPLANE

Regular verb: volplane - volplaned - volplaned

Affirmation

Simple form	V-ing form
I could volplane you could volplane he could volplane we could volplane you could volplane they could volplane	I could be volplaning you could be volplaning he could be volplaning we could be volplaning you could be volplaning they could be volplaning
Perfect	V-ing perfect
I could have volplaned you could have volplaned he could have volplaned we could have volplaned you could have volplaned they could have volplaned	I could have been volplaning you could have been volplaning he could have been volplaning we could have been volplaning you could have been volplaning they could have been volplaning

Negation

Simple form	V-ing form
I could not volplane you could not volplane he could not volplane we could not volplane you could not volplane they could not volplane	I could not be volplaning you could not be volplaning he could not be volplaning we could not be volplaning you could not be volplaning they could not be volplaning
Perfect	V-ing perfect
I could not have volplaned you could not have volplaned he could not have volplaned we could not have volplaned you could not have volplaned they could not have volplaned	I could not have been volplaning you could not have been volplaning he could not have been volplaning we could not have been volplaning you could not have been volplaning they could not have been volplaning

Interrogative form

Simple form	V-ing form
could I volplane? could you volplane? could he volplane? could we volplane? could you volplane? could they volplane?	could I be volplaning? could you be volplaning? could he be volplaning? could we be volplaning? could you be volplaning? could they be volplaning?
Perfect	V-ing perfect
could I have volplaned? could you have volplaned? could he have volplaned? could we have volplaned? could you have volplaned? could they have volplaned?	could I have been volplaning? could you have been volplaning? could he have been volplaning? could we have been volplaning? could you have been volplaning? could they have been volplaning?

Interro-negative form

Simple form	V-ing form
could I not volplane? could you not volplane? could he not volplane? could we not volplane? could you not volplane? could they not volplane?	could I not be volplaning? could you not be volplaning? could he not be volplaning? could we not be volplaning? could you not be volplaning? could they not be volplaning?
Perfect	V-ing perfect
could I not have volplaned? could you not have volplaned? could he not have volplaned? could we not have volplaned? could you not have volplaned? could they not have volplaned?	could I not have been volplaning? could you not have been volplaning? could he not have been volplaning? could we not have been volplaning? could you not have been volplaning? could they not have been volplaning?