@kodawari.sensei: Your Japanese colleague ends a question with の. Do you know what it is doing? の is the casual question ending. It sounds softer, and interested. Textbook: あの資料はもう送りましたか。 Same-year colleague: あれはもう送ったの? 間に合うの? carries more worry than 間に合いますか? It is casual speech. Say it to your boss once and you will feel the room change. Your KODAWARI Sensei is a founder, an engineer, a marketer — and an HR lead, a café owner, a video editor. They can tell you who you are allowed to say it to. Most Sensei offer a $1 first lesson. Link in bio. #learnjapanese #casualjapanese #japanesegrammar #nihongo #japaneseconversation