"My beard and my mustache"
Translation:Моя борода і мої вуса
Why the plural мої for singular вуса?
The a made it look singular to me.
Mustache in English is a name of the whole strip of facial hair. We have word вус (or вусо) to refer to one half of that strip (either left or right), and вуса for the whole strip. Cat's whiskers are also called вуса in Ukrainian (вус for one whisker) :)
I have seen mustaches used in plural before, that didn't throw me, it was the ending. Do many plurals end in a? I saw another this morning. What is the rule for that?
All neuter nouns end in either а or я. A couple of masculine nouns can end in either а or и. Вуса is of those. So, there is actully also a form вуси, but it's less common than вуса