1
courteously + verb
courteously 可放在动词前，强调行为方式。
She courteously welcomed the visitors.
她礼貌地欢迎来访者。
有礼貌地；亲切地
先理解核心含义，再看它在真实句子里的用法。
有礼貌地；亲切地
in a polite manner
She courteously welcomed the visitors.
她礼貌地欢迎来访者。
有礼貌地；谦恭地；客气地。
In a courteous manner; with obliging civility or condescension; politely.
She courteously held the door open for the next customer.
她礼貌地为下一位顾客扶住门。
He courteously asked if I needed any help.
他礼貌地问我是否需要帮助。
The clerk courteously returned the change.
店员礼貌地找回了零钱。
courteously 可放在动词前，强调行为方式。
She courteously welcomed the visitors.
她礼貌地欢迎来访者。
也可放在动词后，通常紧随动词或动词短语，语气更重。
He answered courteously despite the rude question.
尽管问题无礼，他还是礼貌地回答。
被动结构中，courteously 置于过去分词前。
The proposal was courteously declined.
这个提议被礼貌地拒绝了。
Not this
She spoke courteous to the guests.
Use this
She spoke courteously to the guests.
形容词不能修饰动词；修饰说话的方式应用副词 courteously。中文里‘礼貌地’和‘礼貌的’常被混用，但英语中修饰动词 speak 必须用副词。
Not this
He is courteously to everyone.
Use this
He is courteous to everyone.
系动词 is 后应接形容词作表语，不能接副词。courteously 是副词，不能描述主语的状态，应用形容词 courteous。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
礼貌地回应
She responded courteously to every question from the audience.
她礼貌地回应了观众的每一个问题。
举止有礼
The staff are trained to behave courteously in difficult situations.
员工们接受过培训，在困难情况下也要举止有礼。
说话客气
Even when he disagreed, he spoke courteously to his colleagues.
即使不同意，他也客气地和同事们说话。
恭敬地倾听
Please listen courteously while the other person is speaking.
别人说话时，请恭敬地倾听。
婉拒
He declined the invitation courteously and thanked the host.
他婉拒了邀请，并向主人道谢。
Use courteously naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：court（宫廷）里讲究礼节，所以courteously意为‘有礼貌地、亲切地’。
语域：formal 常见场景：formal correspondence、business communication courteously 是较为正式的副词，通常出现在正式书面语或正式场合中；日常口语里更常用 politely。多用于正式信件、商务沟通等语境。
这些词都以 -ously 结尾，拼写相似，但发音并不都与 courteously (/ˈkɜːrtiəsli/) 押韵。courteously 的重音在首音节，元音为 /ɜːr/；seriously (/ˈsɪriəsli/)、obviously (/ˈɑːbviəsli/)、curiously (/ˈkjʊriəsli/)、famously (/ˈfeɪməsli/) 的重音也在首音节，但元音各不相同。spontaneously (/spɑːnˈteɪniəsli/) 和 simultaneously (/ˌsaɪməlˈteɪniəsli/) 都以 /ˈteɪniəsli/ 结尾，彼此押韵，但与 courteously 不押韵。注意不要只凭拼写猜测发音。
Dictionary facts from ECDICT, WIKTIONARY.