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