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