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 may not smoothen you may not smoothen she may not smoothen we may not smoothen you may not smoothen they may not smoothen
V-ing form
I may not be smoothening you may not be smoothening she may not be smoothening we may not be smoothening you may not be smoothening they may not be smoothening
Perfect
I may not have smoothened you may not have smoothened she may not have smoothened we may not have smoothened you may not have smoothened they may not have smoothened
V-ing perfect
I may not have been smoothening you may not have been smoothening she may not have been smoothening we may not have been smoothening you may not have been smoothening they may not 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
may I not smoothen? may you not smoothen? may she not smoothen? may we not smoothen? may you not smoothen? may they not smoothen?
V-ing form
may I not be smoothening? may you not be smoothening? may she not be smoothening? may we not be smoothening? may you not be smoothening? may they not be smoothening?
Perfect
may I not have smoothened? may you not have smoothened? may she not have smoothened? may we not have smoothened? may you not have smoothened? may they not have smoothened?
V-ing perfect
may I not have been smoothening? may you not have been smoothening? may she not have been smoothening? may we not have been smoothening? may you not have been smoothening? may they not have been smoothening?