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