I should look you should look he should look we should look you should look they should look
V-ing form
I should be looking you should be looking he should be looking we should be looking you should be looking they should be looking
Perfect
I should have looked you should have looked he should have looked we should have looked you should have looked they should have looked
V-ing perfect
I should have been looking you should have been looking he should have been looking we should have been looking you should have been looking they should have been looking
Negation
Simple form
I should not look you should not look he should not look we should not look you should not look they should not look
V-ing form
I should not be looking you should not be looking he should not be looking we should not be looking you should not be looking they should not be looking
Perfect
I should not have looked you should not have looked he should not have looked we should not have looked you should not have looked they should not have looked
V-ing perfect
I should not have been looking you should not have been looking he should not have been looking we should not have been looking you should not have been looking they should not have been looking
Interrogative form
Simple form
should I look? should you look? should he look? should we look? should you look? should they look?
V-ing form
should I be looking? should you be looking? should he be looking? should we be looking? should you be looking? should they be looking?
Perfect
should I have looked? should you have looked? should he 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 he have been looking? should we have been looking? should you have been looking? should they have been looking?
Interro-negative form
Simple form
should I not look? should you not look? should he not look? should we not look? should you not look? should they not look?
V-ing form
should I not be looking? should you not be looking? should he not be looking? should we not be looking? should you not be looking? should they not be looking?
Perfect
should I not have looked? should you not have looked? should he not have looked? should we not have looked? should you not have looked? should they not have looked?
V-ing perfect
should I not have been looking? should you not have been looking? should he not have been looking? should we not have been looking? should you not have been looking? should they not have been looking?