1
an impromptu
impromptu 作名词时可数，指即兴创作的短小乐曲、即兴讲话或作品；常用不定冠词 an 表示“一首/一段/一个”。
She played an impromptu at the concert.
她在音乐会上演奏了一首即兴曲。
即兴曲
impromptus — plural of impromptu
先理解核心含义，再看它在真实句子里的用法。
即兴曲
a short musical composition or passage that is improvised or has an improvisatory style, often for solo performance
She played an impromptu at the concert.
她在音乐会上演奏了一首即兴曲。
为非正式场合创作的短小乐曲,通常具有即兴性质,且多为独奏。
A short musical composition for an informal occasion often with the character of improvisation and usually to be played solo.
即兴的讲话或评论
an extemporaneous speech or remark
即兴创作的作品,音乐或其他形式
Any composition, musical or otherwise, that is created on the spot without preparation.
看似即兴创作的短小乐曲
a short musical passage that seems to have been made spontaneously without advance preparation
He gave a short impromptu at the team meeting.
他在团队会议上做了一个简短的即兴发言。
AI contextual example
The pianist performed a beautiful impromptu by Schubert.
钢琴家演奏了舒伯特一首优美的即兴曲。
AI contextual example
Her impromptu about the importance of honesty moved everyone.
她关于诚实重要性的即兴感言感动了每个人。
AI contextual example
a witty impromptu must not sound premeditated
机智的即兴讲话不能听起来像是事先准备好的
WordNet
impromptu 作名词时可数，指即兴创作的短小乐曲、即兴讲话或作品；常用不定冠词 an 表示“一首/一段/一个”。
She played an impromptu at the concert.
她在音乐会上演奏了一首即兴曲。
系表结构 be an impromptu 强调某段音乐、讲话或作品是即兴创作或发表的。
The last piece was an impromptu.
最后那首曲子是一首即兴曲。
Not this
He gave impromptu at the meeting.
Use this
He gave an impromptu at the meeting.
中文名词没有冠词，英语可数名词单数前需要不定冠词；impromptu 作名词表示“即兴讲话”时是可数名词，所以要说 an impromptu。
Not this
She performed three impromptu on the piano.
Use this
She performed three impromptus on the piano.
impromptu 作名词表示“即兴曲”时是规则可数名词，复数形式是直接加 -s 的 impromptus，不能像 sheep 一样零复数。
Not this
He composed an impromptu music.
Use this
He composed an impromptu.
impromptu 本身作名词就指“即兴曲”，再加 music 既冗余也不符合语法（music 是不可数名词，前面不能用 an）。去掉 music，保留 an impromptu 才能准确表达“一首即兴曲”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
演奏即兴曲
She played an impromptu by Schubert at the wedding.
她在婚礼上演奏了一首舒伯特的即兴曲。
创作即兴曲
The composer was asked to compose an impromptu for the reception.
这位作曲家被要求为招待会创作一首即兴曲。
发表即兴讲话
The chairman delivered an impromptu at the banquet.
主席在宴会上发表了一篇即兴讲话。
一首钢琴即兴曲
He wrote a piano impromptu for his daughter.
他为女儿写了一首钢琴即兴曲。
肖邦即兴曲
The audience requested Chopin's impromptu as an encore.
观众请求加演一首肖邦的即兴曲。
最好的即兴演讲是提前精心准备好的。
This quote is often attributed to James Humes, an American author and former presidential speechwriter. It is commonly cited in public-speaking contexts to emphasize that what appears spontaneous is usually the result of careful preparation.
这句话常被引用为美国作家、前总统演讲撰稿人詹姆斯·休姆斯的观点。在公共演讲场合中，人们常用它来说明：看似即兴的内容，其实往往来自充分的准备。
Use impromptus naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
im-（进入）+ prompt（即刻）＋u，想到就立刻弹奏或说出——即兴曲、即兴发言。
语域：mixed 常见场景：古典音乐作品目录或介绍、正式演讲或书面评论 作名词时，impromptu 的语体不固定：在音乐中通常指“即兴曲”，属于中性的专业用语；而指“即兴讲话、即兴评论”时，多用于正式场合或书面语。实际使用时可根据搭配的场合来判断。
可数名词，复数形式为impromptus。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.