1
Regrettably, [independent clause]
句首使用，表达对整个句子的遗憾语气。
Regrettably, the concert was canceled.
遗憾的是，音乐会取消了。
令人遗憾地；可惜地
先理解核心含义，再看它在真实句子里的用法。
令人遗憾地；可惜地
In a manner inspiring or deserving regret.
Regrettably, the concert was canceled.
遗憾的是，音乐会取消了。
以令人遗憾或应受后悔的方式。
In a manner inspiring or deserving regret.
Regrettably, the concert was canceled due to the storm.
遗憾的是，音乐会因暴风雨取消了。
She regrettably missed the bus and arrived late.
她遗憾地错过了公交车，迟到了。
The team, regrettably, did not qualify for the finals.
遗憾的是，这支队伍没有晋级决赛。
句首使用，表达对整个句子的遗憾语气。
Regrettably, the concert was canceled.
遗憾的是，音乐会取消了。
句末使用，语气稍弱，常出现在书面语中。
The project failed, regrettably.
项目失败了，令人遗憾。
Not this
Regrettable, he missed the bus.
Use this
Regrettably, he missed the bus.
错误：将副词'regrettably'误用为形容词'regrettable'。'regrettable'是形容词，意为'令人遗憾的'，不能单独作状语修饰整个句子。应使用副词'regrettably'来修饰全句，表示'令人遗憾的是'。
Not this
Regretfully, the event was cancelled.
Use this
Regrettably, the event was cancelled.
错误：混淆'regretfully'与'regrettably'。'regretfully'意为'遗憾地'，带有主观后悔的情感；而'regrettably'用于客观陈述令人遗憾的事实。这里指事实本身令人遗憾，应使用'regrettably'。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
令人遗憾地普遍
This kind of error is regrettably common in student essays.
这类错误在学生作文中令人遗憾地普遍。
令人遗憾地必要
The layoffs were regrettably necessary to keep the company afloat.
裁员对于维持公司运营是令人遗憾地必要的。
很遗憾地弄错了
She was regrettably mistaken about his intentions.
很遗憾，她对他的意图理解错了。
令人遗憾地属实
It is regrettably true that many old buildings have been demolished.
令人遗憾的是，许多老建筑确实已被拆除。
少得令人遗憾
Regrettably little progress has been made.
令人遗憾的是，所取得的进展甚微。
Use regrettably naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 regrettably 拆成 regret（遗憾）+ -ably（副词后缀），联想成“带着遗憾地说”，即令人遗憾地。
语域：formal 常见场景：正式书面语、正式演讲、新闻报道、正式致歉声明 regrettably 通常用于较正式的书面或口头语境，表示“令人遗憾地”，多出现在新闻报道、官方声明或正式致歉中；日常口语中较少使用。
常置于句首或主句前，表示对后续事实的遗憾。
Dictionary facts from ECDICT, WIKTIONARY.