I may smoothen you may smoothen she may smoothen we may smoothen you may smoothen they may smoothen
V-ing form
I may be smoothening you may be smoothening she may be smoothening we may be smoothening you may be smoothening they may be smoothening
Perfect
I may have smoothened you may have smoothened she may have smoothened we may have smoothened you may have smoothened they may have smoothened
V-ing perfect
I may have been smoothening you may have been smoothening she may have been smoothening we may have been smoothening you may have been smoothening they may have been smoothening
Negation
Simple form
I mayn't smoothen you mayn't smoothen she mayn't smoothen we mayn't smoothen you mayn't smoothen they mayn't smoothen
V-ing form
I mayn't be smoothening you mayn't be smoothening she mayn't be smoothening we mayn't be smoothening you mayn't be smoothening they mayn't be smoothening
Perfect
I mayn't have smoothened you mayn't have smoothened she mayn't have smoothened we mayn't have smoothened you mayn't have smoothened they mayn't have smoothened
V-ing perfect
I mayn't have been smoothening you mayn't have been smoothening she mayn't have been smoothening we mayn't have been smoothening you mayn't have been smoothening they mayn't have been smoothening
Interrogative form
Simple form
may I smoothen? may you smoothen? may she smoothen? may we smoothen? may you smoothen? may they smoothen?
V-ing form
may I be smoothening? may you be smoothening? may she be smoothening? may we be smoothening? may you be smoothening? may they be smoothening?
Perfect
may I have smoothened? may you have smoothened? may she have smoothened? may we have smoothened? may you have smoothened? may they have smoothened?
V-ing perfect
may I have been smoothening? may you have been smoothening? may she have been smoothening? may we have been smoothening? may you have been smoothening? may they have been smoothening?
Interro-negative form
Simple form
mayn't I smoothen? mayn't you smoothen? mayn't she smoothen? mayn't we smoothen? mayn't you smoothen? mayn't they smoothen?
V-ing form
mayn't I be smoothening? mayn't you be smoothening? mayn't she be smoothening? mayn't we be smoothening? mayn't you be smoothening? mayn't they be smoothening?
Perfect
mayn't I have smoothened? mayn't you have smoothened? mayn't she have smoothened? mayn't we have smoothened? mayn't you have smoothened? mayn't they have smoothened?
V-ing perfect
mayn't I have been smoothening? mayn't you have been smoothening? mayn't she have been smoothening? mayn't we have been smoothening? mayn't you have been smoothening? mayn't they have been smoothening?