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Unsuccessfully means you tried and it did not work. Both halves are there, and the trying half is essential — you cannot fail at something you never attempted.
Unsuccessfully means you tried and it did not workunsuccessfully的意思是你試過了，但沒有成功。Both halves are there兩個部分都在裡面, and the trying half is essential而「有嘗試」這一半是不可或缺的——you cannot fail at something you never attempted你沒辦法在一件你根本沒試過的事情上「失敗」。
As an adverb it attaches to a verb of attempting: he tried unsuccessfully, she applied unsuccessfully, they searched unsuccessfully for hours. Very often the word 'try' is right there beside it, and the pair 'tried unsuccessfully to...' is the most common shape by far.
As an adverb作為副詞 it attaches to a verb of attempting它會接在表示嘗試的動詞後面：he tried unsuccessfully, she applied unsuccessfully, they searched unsuccessfully for hours像he tried unsuccessfully、she applied unsuccessfully、they searched unsuccessfully for hours。Very often the word 'try' is right there beside it很多時候'try'這個字就在它旁邊，and the pair 'tried unsuccessfully to...' is the most common shape by far而'tried unsuccessfully to...'這個組合是目前為止最常見的用法。
Two things to feel about the tone. First, it is calm and neutral — it reports a fact without laughing at anyone. That is why news reports and formal writing prefer it: 'doctors worked unsuccessfully to revive him' is respectful in a way that 'they failed to revive him' is not quite. Second, it hints at real effort, sometimes long effort.
Two things to feel about the tone語氣上有兩點值得感受。First首先，it is calm and neutral它很平靜、中性——it reports a fact without laughing at anyone只是陳述一個事實，不帶嘲諷。That is why news reports and formal writing prefer it這也是為什麼新聞報導和正式文章偏好用它：'doctors worked unsuccessfully to revive him' is respectful in a way that 'they failed to revive him' is not quite'doctors worked unsuccessfully to revive him'醫生盡力搶救但沒能成功，這種說法就是比'they failed to revive him'醫生救不回他，來得尊重一些。Second第二，it hints at real effort, sometimes long effort它暗示著真的付出過努力，有時候是很長時間的努力。
Because of that neutral tone it belongs to written English. In talking, people simply say 'I tried but it didn't work' or 'no luck'.
Because of that neutral tone因為這種中性的語氣，it belongs to written English它比較屬於書面英文。In talking在口語裡，people simply say 'I tried but it didn't work' or 'no luck'大家就直接說'I tried but it didn't work'我試過了但沒成功，或'no luck'算了、沒成功。
Position: it usually comes after the verb, or between 'tried' and 'to'.
Position位置上, it usually comes after the verb它通常放在動詞後面，or between 'tried' and 'to'或是放在'tried'跟'to'中間。
組成un- (not) + success + -ful (full of) + -ly (in that way). Built up in layers: success → successful → successfully → unsuccessfully.
同家族的字
- successfullythe positive form — the same word without un-
- successfulthe adjective the adverb is made from
- successthe root noun at the centre of the whole family
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
unsuccessfullyadv/ˌʌnsəkˈsɛsfəli/
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Not successfully; without success; to no avail.
- Thereafter the route of the original line was followed to the harbour, beyond which an extension, a third of a mile long, led to the salt pans and a newly constructed inn, the "Stafford Arms", where Lady Stafford tried unsuccessfully to educate the locals to drink beer instead of a strong whisky.
- He’s like more successful but equally morally abhorrent right-wing undercover operative James O’Keefe’s non-union Mexican equivalent, a dunce whose one move involves incompetently attempting to frame figures of seemingly unimpeachable moral integrity, like Robert Mueller or good old Mayor Pete, as deviant sex criminals like Wohl’s God Donald Trump by unsuccessfully trying to get people to come forward with bogus sexual assault allegations.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。