I'd be commemorating you'd be commemorating he'd be commemorating we'd be commemorating you'd be commemorating they'd be commemorating
Perfect
I should've commemorated you should've commemorated he should've commemorated we should've commemorated you should've commemorated they should've commemorated
V-ing perfect
I should've been commemorating you should've been commemorating he should've been commemorating we should've been commemorating you should've been commemorating they should've been commemorating
Negation
Simple form
I shouldn't commemorate you shouldn't commemorate he shouldn't commemorate we shouldn't commemorate you shouldn't commemorate they shouldn't commemorate
V-ing form
I shouldn't be commemorating you shouldn't be commemorating he shouldn't be commemorating we shouldn't be commemorating you shouldn't be commemorating they shouldn't be commemorating
Perfect
I shouldn't have commemorated you shouldn't have commemorated he shouldn't have commemorated we shouldn't have commemorated you shouldn't have commemorated they shouldn't have commemorated
V-ing perfect
I shouldn't have been commemorating you shouldn't have been commemorating he shouldn't have been commemorating we shouldn't have been commemorating you shouldn't have been commemorating they shouldn't have been commemorating
Interrogative form
Simple form
should I commemorate? should you commemorate? should he commemorate? should we commemorate? should you commemorate? should they commemorate?
V-ing form
should I be commemorating? should you be commemorating? should he be commemorating? should we be commemorating? should you be commemorating? should they be commemorating?
Perfect
should I have commemorated? should you have commemorated? should he have commemorated? should we have commemorated? should you have commemorated? should they have commemorated?
V-ing perfect
should I have been commemorating? should you have been commemorating? should he have been commemorating? should we have been commemorating? should you have been commemorating? should they have been commemorating?
Interro-negative form
Simple form
shouldn't I commemorate? shouldn't you commemorate? shouldn't he commemorate? shouldn't we commemorate? shouldn't you commemorate? shouldn't they commemorate?
V-ing form
shouldn't I be commemorating? shouldn't you be commemorating? shouldn't he be commemorating? shouldn't we be commemorating? shouldn't you be commemorating? shouldn't they be commemorating?
Perfect
shouldn't I have commemorated? shouldn't you have commemorated? shouldn't he have commemorated? shouldn't we have commemorated? shouldn't you have commemorated? shouldn't they have commemorated?
V-ing perfect
shouldn't I have been commemorating? shouldn't you have been commemorating? shouldn't he have been commemorating? shouldn't we have been commemorating? shouldn't you have been commemorating? shouldn't they have been commemorating?