English verb conjugation
COULD CLOSE

Regular verb: close - closed - closed

Affirmation

Simple form	V-ing form
I could close you could close he could close we could close you could close they could close	I could be closing you could be closing he could be closing we could be closing you could be closing they could be closing
Perfect	V-ing perfect
I could have closed you could have closed he could have closed we could have closed you could have closed they could have closed	I could have been closing you could have been closing he could have been closing we could have been closing you could have been closing they could have been closing

Negation

Simple form	V-ing form
I could not close you could not close he could not close we could not close you could not close they could not close	I could not be closing you could not be closing he could not be closing we could not be closing you could not be closing they could not be closing
Perfect	V-ing perfect
I could not have closed you could not have closed he could not have closed we could not have closed you could not have closed they could not have closed	I could not have been closing you could not have been closing he could not have been closing we could not have been closing you could not have been closing they could not have been closing

Interrogative form

Simple form	V-ing form
could I close? could you close? could he close? could we close? could you close? could they close?	could I be closing? could you be closing? could he be closing? could we be closing? could you be closing? could they be closing?
Perfect	V-ing perfect
could I have closed? could you have closed? could he have closed? could we have closed? could you have closed? could they have closed?	could I have been closing? could you have been closing? could he have been closing? could we have been closing? could you have been closing? could they have been closing?

Interro-negative form

Simple form	V-ing form
could I not close? could you not close? could he not close? could we not close? could you not close? could they not close?	could I not be closing? could you not be closing? could he not be closing? could we not be closing? could you not be closing? could they not be closing?
Perfect	V-ing perfect
could I not have closed? could you not have closed? could he not have closed? could we not have closed? could you not have closed? could they not have closed?	could I not have been closing? could you not have been closing? could he not have been closing? could we not have been closing? could you not have been closing? could they not have been closing?