I should smooth you should smooth he should smooth we should smooth you should smooth they should smooth
V-ing form
I should be smoothing you should be smoothing he should be smoothing we should be smoothing you should be smoothing they should be smoothing
Perfect
I should have smoothed you should have smoothed he should have smoothed we should have smoothed you should have smoothed they should have smoothed
V-ing perfect
I should have been smoothing you should have been smoothing he should have been smoothing we should have been smoothing you should have been smoothing they should have been smoothing
Negation
Simple form
I should not smooth you should not smooth he should not smooth we should not smooth you should not smooth they should not smooth
V-ing form
I should not be smoothing you should not be smoothing he should not be smoothing we should not be smoothing you should not be smoothing they should not be smoothing
Perfect
I should not have smoothed you should not have smoothed he should not have smoothed we should not have smoothed you should not have smoothed they should not have smoothed
V-ing perfect
I should not have been smoothing you should not have been smoothing he should not have been smoothing we should not have been smoothing you should not have been smoothing they should not 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
should I not smooth? should you not smooth? should he not smooth? should we not smooth? should you not smooth? should they not smooth?
V-ing form
should I not be smoothing? should you not be smoothing? should he not be smoothing? should we not be smoothing? should you not be smoothing? should they not be smoothing?
Perfect
should I not have smoothed? should you not have smoothed? should he not have smoothed? should we not have smoothed? should you not have smoothed? should they not have smoothed?
V-ing perfect
should I not have been smoothing? should you not have been smoothing? should he not have been smoothing? should we not have been smoothing? should you not have been smoothing? should they not have been smoothing?