I should dupe you should dupe he should dupe we should dupe you should dupe they should dupe
V-ing form
I should be duping you should be duping he should be duping we should be duping you should be duping they should be duping
Perfect
I should have duped you should have duped he should have duped we should have duped you should have duped they should have duped
V-ing perfect
I should have been duping you should have been duping he should have been duping we should have been duping you should have been duping they should have been duping
Negation
Simple form
I should not dupe you should not dupe he should not dupe we should not dupe you should not dupe they should not dupe
V-ing form
I should not be duping you should not be duping he should not be duping we should not be duping you should not be duping they should not be duping
Perfect
I should not have duped you should not have duped he should not have duped we should not have duped you should not have duped they should not have duped
V-ing perfect
I should not have been duping you should not have been duping he should not have been duping we should not have been duping you should not have been duping they should not have been duping
Interrogative form
Simple form
should I dupe? should you dupe? should he dupe? should we dupe? should you dupe? should they dupe?
V-ing form
should I be duping? should you be duping? should he be duping? should we be duping? should you be duping? should they be duping?
Perfect
should I have duped? should you have duped? should he have duped? should we have duped? should you have duped? should they have duped?
V-ing perfect
should I have been duping? should you have been duping? should he have been duping? should we have been duping? should you have been duping? should they have been duping?
Interro-negative form
Simple form
should I not dupe? should you not dupe? should he not dupe? should we not dupe? should you not dupe? should they not dupe?
V-ing form
should I not be duping? should you not be duping? should he not be duping? should we not be duping? should you not be duping? should they not be duping?
Perfect
should I not have duped? should you not have duped? should he not have duped? should we not have duped? should you not have duped? should they not have duped?
V-ing perfect
should I not have been duping? should you not have been duping? should he not have been duping? should we not have been duping? should you not have been duping? should they not have been duping?