English verb conjugation
SHOULD ZIPPER

Regular verb: zipper - zippered - zippered

Affirmation

Simple form	V-ing form
I should zipper you should zipper he should zipper we should zipper you should zipper they should zipper	I should be zippering you should be zippering he should be zippering we should be zippering you should be zippering they should be zippering
Perfect	V-ing perfect
I should have zippered you should have zippered he should have zippered we should have zippered you should have zippered they should have zippered	I should have been zippering you should have been zippering he should have been zippering we should have been zippering you should have been zippering they should have been zippering

Negation

Simple form	V-ing form
I should not zipper you should not zipper he should not zipper we should not zipper you should not zipper they should not zipper	I should not be zippering you should not be zippering he should not be zippering we should not be zippering you should not be zippering they should not be zippering
Perfect	V-ing perfect
I should not have zippered you should not have zippered he should not have zippered we should not have zippered you should not have zippered they should not have zippered	I should not have been zippering you should not have been zippering he should not have been zippering we should not have been zippering you should not have been zippering they should not have been zippering

Interrogative form

Simple form	V-ing form
should I zipper? should you zipper? should he zipper? should we zipper? should you zipper? should they zipper?	should I be zippering? should you be zippering? should he be zippering? should we be zippering? should you be zippering? should they be zippering?
Perfect	V-ing perfect
should I have zippered? should you have zippered? should he have zippered? should we have zippered? should you have zippered? should they have zippered?	should I have been zippering? should you have been zippering? should he have been zippering? should we have been zippering? should you have been zippering? should they have been zippering?

Interro-negative form

Simple form	V-ing form
should I not zipper? should you not zipper? should he not zipper? should we not zipper? should you not zipper? should they not zipper?	should I not be zippering? should you not be zippering? should he not be zippering? should we not be zippering? should you not be zippering? should they not be zippering?
Perfect	V-ing perfect
should I not have zippered? should you not have zippered? should he not have zippered? should we not have zippered? should you not have zippered? should they not have zippered?	should I not have been zippering? should you not have been zippering? should he not have been zippering? should we not have been zippering? should you not have been zippering? should they not have been zippering?