I'd be scanning you'd be scanning she'd be scanning we'd be scanning you'd be scanning they'd be scanning
Perfect
I should've scanned you should've scanned she should've scanned we should've scanned you should've scanned they should've scanned
V-ing perfect
I should've been scanning you should've been scanning she should've been scanning we should've been scanning you should've been scanning they should've been scanning
Negation
Simple form
I shouldn't scan you shouldn't scan she shouldn't scan we shouldn't scan you shouldn't scan they shouldn't scan
V-ing form
I shouldn't be scanning you shouldn't be scanning she shouldn't be scanning we shouldn't be scanning you shouldn't be scanning they shouldn't be scanning
Perfect
I shouldn't have scanned you shouldn't have scanned she shouldn't have scanned we shouldn't have scanned you shouldn't have scanned they shouldn't have scanned
V-ing perfect
I shouldn't have been scanning you shouldn't have been scanning she shouldn't have been scanning we shouldn't have been scanning you shouldn't have been scanning they shouldn't have been scanning
Interrogative form
Simple form
should I scan? should you scan? should she scan? should we scan? should you scan? should they scan?
V-ing form
should I be scanning? should you be scanning? should she be scanning? should we be scanning? should you be scanning? should they be scanning?
Perfect
should I have scanned? should you have scanned? should she have scanned? should we have scanned? should you have scanned? should they have scanned?
V-ing perfect
should I have been scanning? should you have been scanning? should she have been scanning? should we have been scanning? should you have been scanning? should they have been scanning?
Interro-negative form
Simple form
shouldn't I scan? shouldn't you scan? shouldn't she scan? shouldn't we scan? shouldn't you scan? shouldn't they scan?
V-ing form
shouldn't I be scanning? shouldn't you be scanning? shouldn't she be scanning? shouldn't we be scanning? shouldn't you be scanning? shouldn't they be scanning?
Perfect
shouldn't I have scanned? shouldn't you have scanned? shouldn't she have scanned? shouldn't we have scanned? shouldn't you have scanned? shouldn't they have scanned?
V-ing perfect
shouldn't I have been scanning? shouldn't you have been scanning? shouldn't she have been scanning? shouldn't we have been scanning? shouldn't you have been scanning? shouldn't they have been scanning?