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