Quick question. I (usually) remember to use the čárka when "u"is the first letter in a word, but here I changed it to a kroužek since it's no longer the first letter -- and I got "typo" for that. So... if the original word has a čárka, it keeps the čárka even if the position of the letter changes?
I agree with venic212. For me ( also English speaker) She tried unsuccessfully makes more sense. Or as previously said she tried but was unsuccessful. I read widely... a lot different books and I have never come across such a statement. I would never say not even colouquially.