For example, "你有没有空时间呢"? In my intuition, 空时间 is most likely a physics terminology (though it isn't).

  • The context is in scheduling. 你的日程有没有空。This has been elaborated to general conversation by many. I did a double take at the suggestion I was incorrect and asked friends if I’d been using it incorrectly for the decade or so I spent in China and nobody so far has said it is incorrect. That said, like in English or any language for that matter, it’s possible incorrect usages are mainstream.
    – reka18
    Mar 9, 2019 at 16:13

2 Answers 2


你有没有空时间呢 doesn't sound right. Try these variants:





  • Can you explain why not a valid word ?
    – Voyager
    Mar 10, 2019 at 7:23
  • 1
    @rambler Chinese usually don't use 3-character words, there is 空间(space), 时间(time), but no 空时间, in that case you need to use 空闲时间, two 2-character words, or similar forms.
    – sfy
    Mar 10, 2019 at 13:20
  • @Jacob, I said it's a phrase, such as 空教室, 空瓶子
    – Voyager
    Mar 10, 2019 at 13:28
  • 1
    @rambler, It is definitely a phrase, 教室 is built by a verb(acting like an adjective) + noun, 瓶 is just a single noun(子 is meaningless), but 时间 is combined by two concepts together. The word-building are different.
    – sfy
    Mar 10, 2019 at 13:52
  • @Jacob , OK what I want to ask is "Can you explain why not a valid phrase?" "教室" is a 名词. You can't segment is anymore. Such as "老婆饼", it has its own meaning.
    – Voyager
    Mar 10, 2019 at 14:05

Best Chinese dictionary ever. I’ve been using it since 2010 and it just rocks. And that’s besides general experience over a decade.


So as you can see. It is not limited to discussions of physics. Thanks for the upvotes!

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