When do I use 要 vs 要…了?

Use 要 alone to express wants ('我要咖啡' = I want coffee) or future plans ('我下午要去超市' = I will go to the supermarket this afternoon). Use 要…了 to say something is about to happen ('超市要关门了' = The supermarket is about to close). The 了 indicates a near-future change, not a desire.

Can 要 alone mean 'about to'?

Occasionally in very clear contexts (e.g., '我要走了' can imply 'I'm about to leave'), but it's ambiguous. For clarity and correctness, especially with neutral events, use 要…了. '火车要开' sounds odd without 了.

Is '他不来了' correct?

Yes, absolutely. '他不来了' means 'He is not coming (anymore)'. It's a standard way to cancel an imminent event. It uses 不…了, not 不要…了, because the cancellation itself is a change of state. Do not avoid this correct structure.

What is the difference between 要…了, 快要…了, and 就要…了?

They all indicate imminence. 快要…了 is very common and emphasizes 'soon' (e.g., '火车快要开了' = The train is about to leave). 就要…了 often includes a specific time (e.g., '火车七点就要开了' = The train is about to leave at 7). Both are variations of 要…了; the core pattern is still 要…了.

Easily confusedHSK 3

要 vs 要…了 (yào vs yào…le): expressing want, will, and imminent action

要 alone expresses desire (want) or future intention (will), while 要…了 (with the particle 了) signals that an action or change is about to happen imminently. The presence of 了 shifts the meaning from a subjective intention to an objective near-future event, so choosing the right structure depends on whether you mean 'want/will' versus 'about to'.

要 alone is a modal verb meaning 'want' or 'will' (future intention). It does not inherently convey imminence. To express that an event is about to happen, Chinese adds the change-of-state particle 了 after the verb or predicate, forming the 要…了 structure (often with 快要 or 就要 for emphasis). The key mental model: 要 = subjective desire or future plan; 要…了 = objective immediate change. This distinction is crucial because using 要 alone for imminent actions can sound incomplete or ambiguous.

使い分け

要yào

want / will

Use 要 to express a personal desire (want) or a definite future plan (will). It often appears with a verb or adjective. For example, '我要吃饭' means 'I want to eat'. In future contexts, '我明天要去北京' means 'I will go to Beijing tomorrow'—it states an intention but not necessarily immediate action.

要 can sometimes imply 'must' or 'need' in requests ('你要小心' = 'you must be careful') or in a future sense without immediacy. Context disambiguates between want and will.

要…了yào… liǎo

about to happen

Use 要…了 to indicate that an event or change is imminent—about to occur very soon. The verb or adjective is placed between 要 and 了. For example, '火车要开了' means 'The train is about to leave'. This structure often pairs with 快 (快要…了) or 就 (就要…了) to emphasize immediacy.

要…了 only describes imminent change, not desires. Negation is uncommon with this structure (e.g., '不来了' is used to cancel an imminent event, not *不要了).

ひと目で分かる

	要	要…了
Core meaning	Desire (want) or future intention (will)	Imminent change (about to happen)
Structure	要 + verb / adjective (no 了)	要 + verb / adjective + 了
Time reference	Future (any distance) or present want	Immediate near future (soon)
Negation	不要 → 'do not want' or polite 'don't'	Not normal; cancellation uses 不…了 (e.g., 不来了)
Object vs event focus	Focus on subject’s will or plan	Focus on objective upcoming event

例文

要
我要喝水。
Wǒ yào hē shuǐ.
I want to drink water.
Use 要 for desire.
要
我明天要去北京。
Wǒ míng tiān yào qù běi jīng.
I will go to Beijing tomorrow.
Use 要 for a future plan.
要…了
火车要开了。
Huǒ chē yào kāi le.
The train is about to leave.
Imminent action: 要…了.
要…了
快要下雨了。
Kuài yào xià yǔ le.
It's about to rain.
快要…了 intensifies imminence.
要…了
他要来了，我们快准备。
Tā yào lái le, wǒ men kuài zhǔn bèi.
He is about to come, let's prepare quickly.
要…了 for imminent arrival.
要…了
他不来了。
Tā bù lái le.
He is not coming anymore (cancellation).
Negation of imminent event uses 不…了, not 不要…了.

よくある間違い

Using 要 alone for imminent actions: '火车要开' is incomplete; add 了: '火车要开了'.
Using 要…了 for wants: '我要水了' wrongly implies the water is about to appear; instead say '我要水' (I want water) or '我想喝水'.
Negating 要…了 with 不要: '不要来了' sounds like 'don't want to come'; use 不…了: '他不来了'.
Forgetting 了 in '快要…了': '火车快开' should be '火车快开了' or '火车快要开了'.

よくある質問

When do I use 要 vs 要…了?: Use 要 alone to express wants ('我要咖啡' = I want coffee) or future plans ('我下午要去超市' = I will go to the supermarket this afternoon). Use 要…了 to say something is about to happen ('超市要关门了' = The supermarket is about to close). The 了 indicates a near-future change, not a desire.
Can 要 alone mean 'about to'?: Occasionally in very clear contexts (e.g., '我要走了' can imply 'I'm about to leave'), but it's ambiguous. For clarity and correctness, especially with neutral events, use 要…了. '火车要开' sounds odd without 了.
Is '他不来了' correct?: Yes, absolutely. '他不来了' means 'He is not coming (anymore)'. It's a standard way to cancel an imminent event. It uses 不…了, not 不要…了, because the cancellation itself is a change of state. Do not avoid this correct structure.
What is the difference between 要…了, 快要…了, and 就要…了?: They all indicate imminence. 快要…了 is very common and emphasizes 'soon' (e.g., '火车快要开了' = The train is about to leave). 就要…了 often includes a specific time (e.g., '火车七点就要开了' = The train is about to leave at 7). Both are variations of 要…了; the core pattern is still 要…了.