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