Chinese verbs never change shape for time — there is no -ed, no went, no has gone. Instead, a tiny set of post-verbal particles does the work English pins on tense. Three of them — 了 (le), 着 (zhe) and 过 (guo) — form the aspect-particle class: they attach right after the verb, carry no tone of their own, and tell you how the action unfolds. This page looks at them as a particle family — where they sit, how they behave phonologically, what unites them. For the full grammar of each marker, see the aspect markers overview; here we stay on the particle angle.
One class, three particles
An aspect particle answers "how is this action situated?" — finished, in progress, or on your life-résumé — not "when did it happen?" Time itself comes from context words (昨天 yesterday, 明年 next year) or is simply understood.
| Particle | Aspect it marks | Rough English | Example |
|---|---|---|---|
| 了 (le) | perfective — the action is completed / realised | "did / have done" | 我吃了饭 (I ate) |
| 着 (zhe) | durative — an ongoing state continues | "is …-ing / stays …" | 门开着 (the door is open) |
| 过 (guo) | experiential — it has happened at least once | "have ever done" | 我去过中国 (I've been to China) |
我昨天买了一件毛衣。
wǒ zuótiān mǎi le yí jiàn máoyī
I bought a sweater yesterday. (neutral) — 了 marks the purchase as completed.
她手里拿着一杯热咖啡。
tā shǒu lǐ ná zhe yì bēi rè kāfēi
She's holding a cup of hot coffee. (neutral) — 着 shows the holding as an ongoing state.
你去过西藏吗？
nǐ qù guo Xīzàng ma
Have you ever been to Tibet? (informal) — 过 asks about lifetime experience.
The particle profile: post-verbal and toneless
Two features make these three behave as one grammatical class.
They sit immediately after the verb. 了 and 着 glue directly onto the verb; 过 does too, sitting between verb and object. This fixed slot is what marks them as aspect particles rather than the sentence-final particles (吗, 吧, 呢) that cluster at the very end of the clause.
They are neutral-tone. Each of these characters also exists as a full, tone-bearing word — and when it does that job, it means something quite different. The particle is the unstressed, drained version:
| Character | Full word (with tone) | Aspect particle (toneless) |
|---|---|---|
| 了 | 了 liǎo — "to finish, to grasp" (了解 liǎojiě) | le — perfective |
| 着 | 着 zháo / zhuó — "to touch, to catch" | zhe — durative |
| 过 | 过 guò — "to cross, to pass" (过马路 cross the street) | guo — experiential |
Hearing that flattening is a real comprehension skill: native speakers pronounce the particle 过 as a quick, tuneless guo, but the verb 过 ("to cross") keeps its full falling guò.
我们过马路的时候看见了他。
wǒmen guò mǎlù de shíhou kànjiàn le tā
We saw him while crossing the street. (neutral) — 过 guò is the full verb here, then 了 is the toneless particle.
灯还亮着，他应该在家。
dēng hái liàng zhe, tā yīnggāi zài jiā
The light's still on, so he must be home. (informal) — 着 keeps the 'still on' state in view.
Position and negation at a glance
Because these are post-verbal particles, they cluster around the verb, and negation reshuffles them in ways worth previewing (each aspect page covers the details).
- 了 and 过 are negated with 没(有), and 了 usually drops under negation: 我吃了 → 我没吃 (I didn't eat). With 过, 没 is added but 过 stays: 我没去过 (I've never been).
- 着 is rarely negated directly; you negate the whole state instead (门没开着 / 门关着).
我还没吃饭呢，饿死了。
wǒ hái méi chī fàn ne, è sǐ le
I haven't eaten yet — I'm starving. (informal) — negating 了's action drops the 了 and uses 没.
这部电影我没看过。
zhè bù diànyǐng wǒ méi kàn guo
I haven't seen this film. (neutral) — 过 survives negation; 没 does the negating.
Common Mistakes
1. Treating 了 as a past-tense ending. 了 marks completion, not pastness — a completed future action still takes it.
❌ 我明天去了公司。
Wrong reading — this isn't 'I'll go to the office tomorrow'; you can't slap 了 on to mean simple future.
✅ 下了课我就去找你。
xià le kè wǒ jiù qù zhǎo nǐ
Once class is over I'll come find you. (informal) — 了 marks the first action as completed relative to the second, even though it's future.
2. Giving the particle a full tone. Saying guò for the experiential particle turns it into the verb "to cross." Keep it toneless.
❌ 我吃guò了 (pronounced with a full falling 'guò')
Marginal — the experiential particle is a toneless 'guo'; a falling 'guò' sounds like the verb 'to cross'.
✅ 我吃过日本菜。
wǒ chī guo Rìběn cài
I've eaten Japanese food (before). (neutral) — toneless guo marks the experience.
3. Negating 过 with 不. Experiential and perfective are negated with 没, never 不.
❌ 我不去过北京。
Incorrect — experiential 过 is negated with 没: 我没去过北京.
✅ 我没去过北京。
wǒ méi qù guo Běijīng
I've never been to Beijing. (neutral) — 没 + 过 for 'never (yet) experienced'.
4. Confusing durative 着 with progressive 在. 着 marks a lingering state; ongoing activity is 在. See 着 vs 在.
❌ 他着看书。
Incorrect — for the ongoing activity of reading, use 在: 他在看书.
✅ 窗户开着，他在看书。
chuānghu kāi zhe, tā zài kàn shū
The window is open and he's reading. (neutral) — 着 for the open state, 在 for the ongoing action.
Key Takeaways
- 了 / 着 / 过 are one class: post-verbal, toneless aspect particles that show completion, duration, or experience — not tense.
- Each also exists as a full tone-bearing word (了 liǎo, 着 zháo, 过 guò); the particle is the drained, neutral-tone version.
- Aspect ≠ time. 了 can sit in a future clause; 过 says "at least once, ever," with no date attached.
- Negation reshuffles them: 没 negates 了 (which then drops) and 过 (which stays); 着 is negated by rephrasing the state.
- Don't confuse the post-verbal aspect 了 with the sentence-final 了 of new situations — different slot, different job.
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- The Perfective 了 (le₁): Completed ActionHSK 1 — The verb-suffix 了 (le₁) sits right after the verb and marks the action as completed or realized — 我吃了饭, 买了三本书. It is completion aspect, not past tense, so it can even point to the future: 下了课就走.
- The Durative 着 (zhe): Ongoing StateHSK 3 — 着 (zhe) after a verb marks a persisting STATE, not an action in progress — 门开着 'the door is (standing) open', 他拿着一本书 'he's holding a book' — contrasting with dynamic 在.
- The Experiential 过 (guo): Have Ever DoneHSK 2 — 过 after a verb marks an EXPERIENCE — 'have done at least once in your life': 我去过中国 'I've been to China', 你吃过北京烤鸭吗 'have you ever eaten Beijing duck?'. It's the 'have you ever…' of Chinese, distinct from 了's specific completed event.
- 了 (Change of State / New Situation)HSK 1 — Sentence-final 了 (le₂) announces that a new situation has arisen — 'now / has become', not past tense: 下雨了 it's raining now, 我知道了 I get it now, 十二点了 it's twelve o'clock now.