I should smoothen you should smoothen she should smoothen we should smoothen you should smoothen they should smoothen
V-ing form
I should be smoothening you should be smoothening she should be smoothening we should be smoothening you should be smoothening they should be smoothening
Perfect
I should have smoothened you should have smoothened she should have smoothened we should have smoothened you should have smoothened they should have smoothened
V-ing perfect
I should have been smoothening you should have been smoothening she should have been smoothening we should have been smoothening you should have been smoothening they should have been smoothening
Negation
Simple form
I should not smoothen you should not smoothen she should not smoothen we should not smoothen you should not smoothen they should not smoothen
V-ing form
I should not be smoothening you should not be smoothening she should not be smoothening we should not be smoothening you should not be smoothening they should not be smoothening
Perfect
I should not have smoothened you should not have smoothened she should not have smoothened we should not have smoothened you should not have smoothened they should not have smoothened
V-ing perfect
I should not have been smoothening you should not have been smoothening she should not have been smoothening we should not have been smoothening you should not have been smoothening they should not have been smoothening
Interrogative form
Simple form
should I smoothen? should you smoothen? should she smoothen? should we smoothen? should you smoothen? should they smoothen?
V-ing form
should I be smoothening? should you be smoothening? should she be smoothening? should we be smoothening? should you be smoothening? should they be smoothening?
Perfect
should I have smoothened? should you have smoothened? should she have smoothened? should we have smoothened? should you have smoothened? should they have smoothened?
V-ing perfect
should I have been smoothening? should you have been smoothening? should she have been smoothening? should we have been smoothening? should you have been smoothening? should they have been smoothening?
Interro-negative form
Simple form
should I not smoothen? should you not smoothen? should she not smoothen? should we not smoothen? should you not smoothen? should they not smoothen?
V-ing form
should I not be smoothening? should you not be smoothening? should she not be smoothening? should we not be smoothening? should you not be smoothening? should they not be smoothening?
Perfect
should I not have smoothened? should you not have smoothened? should she not have smoothened? should we not have smoothened? should you not have smoothened? should they not have smoothened?
V-ing perfect
should I not have been smoothening? should you not have been smoothening? should she not have been smoothening? should we not have been smoothening? should you not have been smoothening? should they not have been smoothening?