Quote Originally Posted by radomir View Post
Here is а question on this matter.
Appearing ё for e. Повернýть -> повёрнутый, повернута (short form), ( and in verbs like развернýть), that I suppose stressed повéрнута. In the dictionary it presents as a rule in verbs like these, but my problem is why appears this ё not being in its stem nor in past; just obviously in present 2nd person sing. I have no explanation for it, save of course: Roma locuta est, causa finita . Thank you.
1. повёрнута
2. For the purpose of learning Russian as a foreign language I would recommend to consider it the other way around. It could make more sense if you just consider ё as the default vowel in this verb and memorize it as "повёрнуть". Yes, there is no such a word in Russian. But the only thing you need is to apply the rule: ё is always replaced by е when it is not stressed (both in spelling and in pronunciation).
So, you get: повернуть - я повернул - повёрнутый; развернуть - я развернул - развёрнутый - развёртка; отвернуть - я отвернул - отвёрнутый - отвёртка, завернуть - завёрнут, свернуть - свёрнут etc. I cannot think of a single word (not only a verb, but a noun as well) with "вёрн/вёрт" root where it is pronounced with е in a stressed position.
3. Unfortunately, the most of printed text in Russian fail to distinguish ё and е in spelling. You cannot do anything with that, it's just a tradition (ё is not considered mandatory by most of people).