I should staple you should staple she should staple we should staple you should staple they should staple
V-ing form
I should be stapling you should be stapling she should be stapling we should be stapling you should be stapling they should be stapling
Perfect
I should have stapled you should have stapled she should have stapled we should have stapled you should have stapled they should have stapled
V-ing perfect
I should have been stapling you should have been stapling she should have been stapling we should have been stapling you should have been stapling they should have been stapling
Negation
Simple form
I should not staple you should not staple she should not staple we should not staple you should not staple they should not staple
V-ing form
I should not be stapling you should not be stapling she should not be stapling we should not be stapling you should not be stapling they should not be stapling
Perfect
I should not have stapled you should not have stapled she should not have stapled we should not have stapled you should not have stapled they should not have stapled
V-ing perfect
I should not have been stapling you should not have been stapling she should not have been stapling we should not have been stapling you should not have been stapling they should not have been stapling
Interrogative form
Simple form
should I staple? should you staple? should she staple? should we staple? should you staple? should they staple?
V-ing form
should I be stapling? should you be stapling? should she be stapling? should we be stapling? should you be stapling? should they be stapling?
Perfect
should I have stapled? should you have stapled? should she have stapled? should we have stapled? should you have stapled? should they have stapled?
V-ing perfect
should I have been stapling? should you have been stapling? should she have been stapling? should we have been stapling? should you have been stapling? should they have been stapling?
Interro-negative form
Simple form
should I not staple? should you not staple? should she not staple? should we not staple? should you not staple? should they not staple?
V-ing form
should I not be stapling? should you not be stapling? should she not be stapling? should we not be stapling? should you not be stapling? should they not be stapling?
Perfect
should I not have stapled? should you not have stapled? should she not have stapled? should we not have stapled? should you not have stapled? should they not have stapled?
V-ing perfect
should I not have been stapling? should you not have been stapling? should she not have been stapling? should we not have been stapling? should you not have been stapling? should they not have been stapling?