English verb conjugation
SHOULD STAPLE

Regular verb: staple - stapled - stapled

Affirmation

Simple form	V-ing form
I should staple you should staple he should staple we should staple you should staple they should staple	I should be stapling you should be stapling he should be stapling we should be stapling you should be stapling they should be stapling
Perfect	V-ing perfect
I should have stapled you should have stapled he should have stapled we should have stapled you should have stapled they should have stapled	I should have been stapling you should have been stapling he should have been stapling we should have been stapling you should have been stapling they should have been stapling

Negation

Simple form	V-ing form
I should not staple you should not staple he should not staple we should not staple you should not staple they should not staple	I should not be stapling you should not be stapling he should not be stapling we should not be stapling you should not be stapling they should not be stapling
Perfect	V-ing perfect
I should not have stapled you should not have stapled he should not have stapled we should not have stapled you should not have stapled they should not have stapled	I should not have been stapling you should not have been stapling he 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	V-ing form
should I staple? should you staple? should he staple? should we staple? should you staple? should they staple?	should I be stapling? should you be stapling? should he be stapling? should we be stapling? should you be stapling? should they be stapling?
Perfect	V-ing perfect
should I have stapled? should you have stapled? should he have stapled? should we have stapled? should you have stapled? should they have stapled?	should I have been stapling? should you have been stapling? should he have been stapling? should we have been stapling? should you have been stapling? should they have been stapling?

Interro-negative form

Simple form	V-ing form
should I not staple? should you not staple? should he not staple? should we not staple? should you not staple? should they not staple?	should I not be stapling? should you not be stapling? should he not be stapling? should we not be stapling? should you not be stapling? should they not be stapling?
Perfect	V-ing perfect
should I not have stapled? should you not have stapled? should he not have stapled? should we not have stapled? should you not have stapled? should they not have stapled?	should I not have been stapling? should you not have been stapling? should he not have been stapling? should we not have been stapling? should you not have been stapling? should they not have been stapling?