BTW 用来补充临时想到的细节或问题，通常不是这条消息的重点。它常见于聊天、社交媒体和非正式邮件。正式信件或作文中可以用 also；IELTS Speaking 中则把 by the way 完整说出来。
能把 btw 用进一条消息吗？
写一条简短消息，查看用法问题与更自然的表达建议。
本次检查比平时稍久，完成后反馈会自动显示在这里。
btw, + statement; oh, btw…
- btw, I found a great café near the office, let's go there on Friday.
- The flight was delayed for two hours. btw, they gave everyone free snacks.
- btw, don't forget your umbrella, it's supposed to rain later.
修改原因
修改前Dear Mr Ivanov, thank you for sending the contract. Btw, our office will be closed on Monday.
修改后Dear Mr Ivanov, thank you for sending the contract. Also, our office will be closed on Monday.
BTW 是聊天缩写，正式信件通常避免这种简写。原句改用 also，同样能引出补充消息，但语气中性。
与 btw 补充细节不同，anyway 在这里的用法是收住刚才的话题，以便回到重点、转移话题或结束谈话：We got lost for an hour. Anyway, we found the hotel in the end。
动手练习
See you at the station at ten. Oh, ___, did you ever find your passport?
查看答案
btw — 消息的重点是约好在车站见面，询问护照只是顺便补充的问题，因此选 btw。Tbh 用来引出坦率的看法；这里没有观点，只是在提问。
给朋友写一条消息，说明在哪里、什么时候见面，再用 btw 补充一个顺便想到的细节或问题。
We're meeting at 7 near the metro. btw, I invited Sam too, hope that's fine.
练习把新词用准确
用正在学的词造句。LetsWords 检查用法和语法，提供修改与母语解释，再通过复习巩固。