I'd be staining you'd be staining she'd be staining we'd be staining you'd be staining they'd be staining
Perfect
I should've stained you should've stained she should've stained we should've stained you should've stained they should've stained
V-ing perfect
I should've been staining you should've been staining she should've been staining we should've been staining you should've been staining they should've been staining
Negation
Simple form
I shouldn't stain you shouldn't stain she shouldn't stain we shouldn't stain you shouldn't stain they shouldn't stain
V-ing form
I shouldn't be staining you shouldn't be staining she shouldn't be staining we shouldn't be staining you shouldn't be staining they shouldn't be staining
Perfect
I shouldn't have stained you shouldn't have stained she shouldn't have stained we shouldn't have stained you shouldn't have stained they shouldn't have stained
V-ing perfect
I shouldn't have been staining you shouldn't have been staining she shouldn't have been staining we shouldn't have been staining you shouldn't have been staining they shouldn't have been staining
Interrogative form
Simple form
should I stain? should you stain? should she stain? should we stain? should you stain? should they stain?
V-ing form
should I be staining? should you be staining? should she be staining? should we be staining? should you be staining? should they be staining?
Perfect
should I have stained? should you have stained? should she have stained? should we have stained? should you have stained? should they have stained?
V-ing perfect
should I have been staining? should you have been staining? should she have been staining? should we have been staining? should you have been staining? should they have been staining?
Interro-negative form
Simple form
shouldn't I stain? shouldn't you stain? shouldn't she stain? shouldn't we stain? shouldn't you stain? shouldn't they stain?
V-ing form
shouldn't I be staining? shouldn't you be staining? shouldn't she be staining? shouldn't we be staining? shouldn't you be staining? shouldn't they be staining?
Perfect
shouldn't I have stained? shouldn't you have stained? shouldn't she have stained? shouldn't we have stained? shouldn't you have stained? shouldn't they have stained?
V-ing perfect
shouldn't I have been staining? shouldn't you have been staining? shouldn't she have been staining? shouldn't we have been staining? shouldn't you have been staining? shouldn't they have been staining?