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