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