I should cross you should cross she should cross we should cross you should cross they should cross
V-ing form
I should be crossing you should be crossing she should be crossing we should be crossing you should be crossing they should be crossing
Perfect
I should have crossed you should have crossed she should have crossed we should have crossed you should have crossed they should have crossed
V-ing perfect
I should have been crossing you should have been crossing she should have been crossing we should have been crossing you should have been crossing they should have been crossing
Negation
Simple form
I should not cross you should not cross she should not cross we should not cross you should not cross they should not cross
V-ing form
I should not be crossing you should not be crossing she should not be crossing we should not be crossing you should not be crossing they should not be crossing
Perfect
I should not have crossed you should not have crossed she should not have crossed we should not have crossed you should not have crossed they should not have crossed
V-ing perfect
I should not have been crossing you should not have been crossing she should not have been crossing we should not have been crossing you should not have been crossing they should not have been crossing
Interrogative form
Simple form
should I cross? should you cross? should she cross? should we cross? should you cross? should they cross?
V-ing form
should I be crossing? should you be crossing? should she be crossing? should we be crossing? should you be crossing? should they be crossing?
Perfect
should I have crossed? should you have crossed? should she have crossed? should we have crossed? should you have crossed? should they have crossed?
V-ing perfect
should I have been crossing? should you have been crossing? should she have been crossing? should we have been crossing? should you have been crossing? should they have been crossing?
Interro-negative form
Simple form
should I not cross? should you not cross? should she not cross? should we not cross? should you not cross? should they not cross?
V-ing form
should I not be crossing? should you not be crossing? should she not be crossing? should we not be crossing? should you not be crossing? should they not be crossing?
Perfect
should I not have crossed? should you not have crossed? should she not have crossed? should we not have crossed? should you not have crossed? should they not have crossed?
V-ing perfect
should I not have been crossing? should you not have been crossing? should she not have been crossing? should we not have been crossing? should you not have been crossing? should they not have been crossing?