I'd be spreading you'd be spreading he'd be spreading we'd be spreading you'd be spreading they'd be spreading
Perfect
I should've spread you should've spread he should've spread we should've spread you should've spread they should've spread
V-ing perfect
I should've been spreading you should've been spreading he should've been spreading we should've been spreading you should've been spreading they should've been spreading
Negation
Simple form
I shouldn't spread you shouldn't spread he shouldn't spread we shouldn't spread you shouldn't spread they shouldn't spread
V-ing form
I shouldn't be spreading you shouldn't be spreading he shouldn't be spreading we shouldn't be spreading you shouldn't be spreading they shouldn't be spreading
Perfect
I shouldn't have spread you shouldn't have spread he shouldn't have spread we shouldn't have spread you shouldn't have spread they shouldn't have spread
V-ing perfect
I shouldn't have been spreading you shouldn't have been spreading he shouldn't have been spreading we shouldn't have been spreading you shouldn't have been spreading they shouldn't have been spreading
Interrogative form
Simple form
should I spread? should you spread? should he spread? should we spread? should you spread? should they spread?
V-ing form
should I be spreading? should you be spreading? should he be spreading? should we be spreading? should you be spreading? should they be spreading?
Perfect
should I have spread? should you have spread? should he 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 he have been spreading? should we have been spreading? should you have been spreading? should they have been spreading?
Interro-negative form
Simple form
shouldn't I spread? shouldn't you spread? shouldn't he spread? shouldn't we spread? shouldn't you spread? shouldn't they spread?
V-ing form
shouldn't I be spreading? shouldn't you be spreading? shouldn't he be spreading? shouldn't we be spreading? shouldn't you be spreading? shouldn't they be spreading?
Perfect
shouldn't I have spread? shouldn't you have spread? shouldn't he have spread? shouldn't we have spread? shouldn't you have spread? shouldn't they have spread?
V-ing perfect
shouldn't I have been spreading? shouldn't you have been spreading? shouldn't he have been spreading? shouldn't we have been spreading? shouldn't you have been spreading? shouldn't they have been spreading?