I should itch you should itch he should itch we should itch you should itch they should itch
V-ing form
I should be itching you should be itching he should be itching we should be itching you should be itching they should be itching
Perfect
I should have itched you should have itched he should have itched we should have itched you should have itched they should have itched
V-ing perfect
I should have been itching you should have been itching he should have been itching we should have been itching you should have been itching they should have been itching
Negation
Simple form
I should not itch you should not itch he should not itch we should not itch you should not itch they should not itch
V-ing form
I should not be itching you should not be itching he should not be itching we should not be itching you should not be itching they should not be itching
Perfect
I should not have itched you should not have itched he should not have itched we should not have itched you should not have itched they should not have itched
V-ing perfect
I should not have been itching you should not have been itching he should not have been itching we should not have been itching you should not have been itching they should not have been itching
Interrogative form
Simple form
should I itch? should you itch? should he itch? should we itch? should you itch? should they itch?
V-ing form
should I be itching? should you be itching? should he be itching? should we be itching? should you be itching? should they be itching?
Perfect
should I have itched? should you have itched? should he have itched? should we have itched? should you have itched? should they have itched?
V-ing perfect
should I have been itching? should you have been itching? should he have been itching? should we have been itching? should you have been itching? should they have been itching?
Interro-negative form
Simple form
should I not itch? should you not itch? should he not itch? should we not itch? should you not itch? should they not itch?
V-ing form
should I not be itching? should you not be itching? should he not be itching? should we not be itching? should you not be itching? should they not be itching?
Perfect
should I not have itched? should you not have itched? should he not have itched? should we not have itched? should you not have itched? should they not have itched?
V-ing perfect
should I not have been itching? should you not have been itching? should he not have been itching? should we not have been itching? should you not have been itching? should they not have been itching?