I should bum you should bum he should bum we should bum you should bum they should bum
V-ing form
I should be bumming you should be bumming he should be bumming we should be bumming you should be bumming they should be bumming
Perfect
I should have bummed you should have bummed he should have bummed we should have bummed you should have bummed they should have bummed
V-ing perfect
I should have been bumming you should have been bumming he should have been bumming we should have been bumming you should have been bumming they should have been bumming
Negation
Simple form
I should not bum you should not bum he should not bum we should not bum you should not bum they should not bum
V-ing form
I should not be bumming you should not be bumming he should not be bumming we should not be bumming you should not be bumming they should not be bumming
Perfect
I should not have bummed you should not have bummed he should not have bummed we should not have bummed you should not have bummed they should not have bummed
V-ing perfect
I should not have been bumming you should not have been bumming he should not have been bumming we should not have been bumming you should not have been bumming they should not have been bumming
Interrogative form
Simple form
should I bum? should you bum? should he bum? should we bum? should you bum? should they bum?
V-ing form
should I be bumming? should you be bumming? should he be bumming? should we be bumming? should you be bumming? should they be bumming?
Perfect
should I have bummed? should you have bummed? should he have bummed? should we have bummed? should you have bummed? should they have bummed?
V-ing perfect
should I have been bumming? should you have been bumming? should he have been bumming? should we have been bumming? should you have been bumming? should they have been bumming?
Interro-negative form
Simple form
should I not bum? should you not bum? should he not bum? should we not bum? should you not bum? should they not bum?
V-ing form
should I not be bumming? should you not be bumming? should he not be bumming? should we not be bumming? should you not be bumming? should they not be bumming?
Perfect
should I not have bummed? should you not have bummed? should he not have bummed? should we not have bummed? should you not have bummed? should they not have bummed?
V-ing perfect
should I not have been bumming? should you not have been bumming? should he not have been bumming? should we not have been bumming? should you not have been bumming? should they not have been bumming?