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Chinese grammar lessons › Level A2 › 了 (le) in Chinese, explained

要…了, 快要…了: about to happen

火车要开了, 快下雨了, 明天就要考试了: something is about to happen.

Part of the free A2 Chinese course (about HSK 3). Examples are in Simplified characters with pinyin; press the speaker to hear one with your device's Chinese voice.

Just about to…

To say something is about to happen, Chinese wraps the verb in a frame: a word before it and 了 at the end.

PatternPinyinFeel
要 + verb + 了yào … leabout to
快要 + verb + 了kuài yào … levery soon, nearly
快 + verb + 了kuài … levery soon, nearly (shorter)
就要 + verb + 了jiù yào … levery soon; can take a time word
  • 火车要开了。(Huǒchē yào kāi le.)The train is about to leave.
  • 快要下雨了。(Kuài yào xià yǔ le.)It's about to rain.
  • 我们快到了。(Wǒmen kuài dào le.)We're almost there.
  • 电影就要开始了。(Diànyǐng jiù yào kāishǐ le.)The film is about to start.

The 了 at the end matters. It is the "new situation" 了 of 了 at the end: something has changed: the change is right on top of you. Without it, 火车要开 sounds like "the train will leave" or "the train wants to leave", not "is about to".

With a time word: 就要, not 快要

If you say when (明天, 下个月, 五点), use 就要 (plain 要…了 also works: 他明天要走了). 快 and 快要 can't follow a time word.

  • 她下个月就要结婚了。(Tā xià gè yuè jiù yào jiéhūn le.)She's getting married next month.

快 + a number or a time

快 can also go before a number, a time or an adjective: "nearly".

  • 快十二点了,睡觉吧。(Kuài shí'èr diǎn le, shuìjiào ba.)It's nearly twelve; go to bed.
  • 我爸爸快六十岁了。(Wǒ bàba kuài liùshí suì le.)My dad is nearly sixty.

A common answer when someone asks if you're done: 快好了!(Kuài hǎo le!) = Nearly ready!

Common mistakes

  • 火车要开。 for "the train is about to leave" → 火车要开了。The final 了 makes it "about to".
  • 我们下个月快要放假了。 → 我们下个月就要放假了。After a time word, use 就要.
  • 他快要了走。 → 他快要走了。了 goes at the end, after the verb.
  • 她快五十岁。 → 她快五十岁了。"Nearly" with 快 needs the final 了.

Practice

  1. 飞机_____起飞了。(Fēijī ___ qǐfēi le.)
    The plane is about to take off.
    Options: 快要 (kuài yào) · 正在 (zhèngzài) · 已经 (yǐjīng)
    Show the answer

    快要 (kuài yào) — About to: 快要…了. 已经…了 = has already taken off.

  2. 比赛快开始_____。(Bǐsài kuài kāishǐ ___.)
    The match is about to start.
    Show the answer

    了 — 快 + verb + 了.

  3. Which sentence is correct for 'We're going to Beijing tomorrow' (very soon)?
    Options: 我们明天就要去北京了。(Wǒmen míngtiān jiù yào qù Běijīng le.) · 我们明天快要去北京了。(Wǒmen míngtiān kuài yào qù Běijīng le.) · 我们明天快去北京了。(Wǒmen míngtiān kuài qù Běijīng le.)
    Show the answer

    我们明天就要去北京了。(Wǒmen míngtiān jiù yào qù Běijīng le.) — With a time word like 明天, use 就要…了 (plain 要…了 also works); 快(要) can't follow a time word.

  4. What does 他快到了。(Tā kuài dào le.) mean?
    Options: He'll be here soon. · He has arrived. · He arrived quickly.
    Show the answer

    He'll be here soon.

In the app, this lesson is taught one idea at a time with the examples read aloud, followed by questions you can answer in characters or pinyin. It then comes back for review on later days, until you've answered it correctly on three separate days.