順著對方的請求去做
同樣一條「你來要求、我就去做」的線，只是這裡不是規定綁的，而是自己願意接下來的。因為是自願，語氣反而變得客氣、甚至有點紳士味。
do a favor · verb · B2
To do something that someone has asked you to do, especially to help or please them.
樂意幫忙；效勞
核心畫面
Picture a duty tied around someone so that one path is closed off: the rule, the contract, the situation leaves them no real choice. English then turns the same tie into — doing what you were asked, and the very phrases people use when they ask or thank.
可以想成：有一條「該做」的線綁在人身上，讓某個選項變得不能不做——規定、合約、當下的處境都可能是那條線。有意思的是，…更多收起
可以想成：有一條「該做」的線綁在人身上，讓某個選項變得不能不做——規定、合約、當下的處境都可能是那條線。有意思的是，英文把同一條線轉成了禮貌：對方開口請你做，你答應了，也是 oblige；而最客氣的請託和道謝說法，同樣是從這個字來的。這個字整體偏正式，日常口語裡多半會換成 have to 或 help out。From the picture
客氣的請託與道謝（固定說法）
英文的客套常常靠「把自己說成欠對方的一方」來完成：你若幫了我，我就欠你這份情。這一支的兩個說法都不能拆開理解，要整句記。
I'd be obliged if... · verb · C1
Used in the phrase I'd be obliged if… to ask someone politely to do something.
煩請；勞駕（若能……將感激）
Also in this word
be obliged to · verb · B2
If you are obliged to do something, you have to do it because a rule, a duty, or the situation makes it necessary.
被迫；有義務
原始詞典資料3 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。
obligeverb/əˈblaɪd͡ʒ/
- 1
To constrain someone by force or by social, moral or legal means.
- Your carelessness obliges firmness on my part.
- I am obliged to report to the police station every week.
- 2
To do (someone) a service or favour (hence, originally, creating an obligation).
- He obliged me by not parking his car in the drive.
- The singer obliged(us) with an encore.
- 3
To cause somebody to feel indebted.
- I am much obliged to you for your recent help.
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。