I should treat you should treat he should treat we should treat you should treat they should treat
V-ing form
I should be treating you should be treating he should be treating we should be treating you should be treating they should be treating
Perfect
I should have treated you should have treated he should have treated we should have treated you should have treated they should have treated
V-ing perfect
I should have been treating you should have been treating he should have been treating we should have been treating you should have been treating they should have been treating
Negation
Simple form
I should not treat you should not treat he should not treat we should not treat you should not treat they should not treat
V-ing form
I should not be treating you should not be treating he should not be treating we should not be treating you should not be treating they should not be treating
Perfect
I should not have treated you should not have treated he should not have treated we should not have treated you should not have treated they should not have treated
V-ing perfect
I should not have been treating you should not have been treating he should not have been treating we should not have been treating you should not have been treating they should not have been treating
Interrogative form
Simple form
should I treat? should you treat? should he treat? should we treat? should you treat? should they treat?
V-ing form
should I be treating? should you be treating? should he be treating? should we be treating? should you be treating? should they be treating?
Perfect
should I have treated? should you have treated? should he have treated? should we have treated? should you have treated? should they have treated?
V-ing perfect
should I have been treating? should you have been treating? should he have been treating? should we have been treating? should you have been treating? should they have been treating?
Interro-negative form
Simple form
should I not treat? should you not treat? should he not treat? should we not treat? should you not treat? should they not treat?
V-ing form
should I not be treating? should you not be treating? should he not be treating? should we not be treating? should you not be treating? should they not be treating?
Perfect
should I not have treated? should you not have treated? should he not have treated? should we not have treated? should you not have treated? should they not have treated?
V-ing perfect
should I not have been treating? should you not have been treating? should he not have been treating? should we not have been treating? should you not have been treating? should they not have been treating?