Chinese Past Tense: Rules, Time Markers, and Examples

Key takeaways

• Mandarin Chinese has no verb conjugation: verbs do not change form to show past tense.
• Past time is indicated through time words (yesterday, last week) and aspect markers (了 le, 过 guo).
• 了 (le) marks a completed action, not necessarily a past one; it can appear with future actions that will be complete.
• 过 (guo) marks a past experience: something that happened at least once at some point in the past.
• The difference between 了 and 过 is the difference between I ate breakfast (specific completed event) and I have eaten Peking Duck before (past experience).

Learning Chinese after studying European languages means unlearning one assumption immediately: verbs do not change form to show time. There is no went vs. go, no ate vs. eat. The verb is always the same.

Instead, Chinese uses time words and aspect markers to communicate when something happened, whether it was completed, and whether it counts as a past experience.

This guide covers Chinese time markers for the past, the aspect marker 了 (le) and how it signals completion, the aspect marker 过 (guo) and how it signals past experience, the difference between the two, and how time markers and aspect markers work together in sentences. italki connects you with Chinese teachers online who can drill these distinctions with you in real conversation until they become instinctive.

Time words for the past

The clearest way to signal the past in Mandarin is with time words. These appear at the beginning of the sentence or after the subject.

Chinese	Pinyin	English
昨天	zuótiān	yesterday
前天	qiántiān	the day before yesterday
上周	shàng zhōu	last week
上个月	shàng gè yuè	last month
去年	qùnián	last year
刚才	gāng cái	just now / a moment ago
以前	yǐqián	before / in the past
从前	cóngqián	once upon a time / formerly
那时候	nà shíhòu	at that time
小时候	xiǎoshíhòu	when (I was) a child

Examples:

• 昨天我去了超市。(Zuótiān wǒ qù le chāoshì: I went to the supermarket yesterday.)
• 去年她学了中文。(Qùnián tā xué le Zhōngwén: She studied Chinese last year.)
• 小时候，我不喜欢蔬菜。(Xiǎoshíhòu, wǒ bù xǐhuān shūcài: When I was a child, I did not like vegetables.)

Work with Chinese tutors on italki to build past-time awareness through conversation practice.

了 (le): completion marker 了 (le) placed after a verb indicates that the action has been completed. It is often translated as past tense, but its real function is marking completion, not pastness.

Structure: Subject + Verb + 了 + Object

Chinese	Pinyin	English
我吃了早饭。	Wǒ chī le zǎofàn.	I ate breakfast.
她买了一件衣服。	Tā mǎi le yī jiàn yīfú.	She bought a piece of clothing.
他喝了很多水。	Tā hē le hěn duō shuǐ.	He drank a lot of water.
我们看了一部电影。	Wǒmen kàn le yī bù diànyǐng.	We watched a film.

Why 了 is not simply past tense:

了 can appear with future events that will be completed:

• 等我到了北京，我给你打电话。(Děng wǒ dào le Běijīng, wǒ gěi nǐ dǎ diànhuà: When I arrive in Beijing [completed], I’ll call you.)

Here, 到了 describes future arrival as completed action. This is impossible in a simple past tense system.

Negative of 了 sentences: use 没 (méi: did not) before the verb; 了 is dropped.

• 我没吃早饭。(Wǒ méi chī zǎofàn: I did not eat breakfast.)
• 她没买衣服。(Tā méi mǎi yīfú: She did not buy clothing.)

Book online Chinese lessons to distinguish completion marker 了 from actual pastness by examining both past and future examples.

过 (guo): past experience marker

过 (guo) placed after a verb indicates that the action has been experienced at least once at some point in the speaker’s life. It does not imply the action is still relevant or recently completed.

Structure: Subject + Verb + 过 + Object

Chinese	Pinyin	English
我去过日本。	Wǒ qù guo Rìběn.	I have been to Japan (before).
她吃过北京烤鸭。	Tā chī guo Běijīng kǎoyā.	She has eaten Peking Duck before.
你学过法语吗？	Nǐ xué guo Fǎyǔ ma?	Have you ever studied French?
他没去过中国。	Tā méi qù guo Zhōngguó.	He has never been to China.

Negative of 过 sentences: use 没 before the verb; 过 is retained.

• 我没去过欧洲。(Wǒ méi qù guo Ōuzhōu: I have never been to Europe.) – 过 stays
• 他没学过日语。(Tā méi xué guo Rìyǔ: He has never studied Japanese.)

Explore the past experience frame by asking and answering 过 questions with a Chinese tutor.

了 vs. 过: the key distinction

Feature	了 (le)	过 (guo)
What it marks	Completion of a specific action	Past experience (at least once)
Time relevance	Often implies recent or specific past	No specific time implied
Negative	没 + verb (drop 了)	没 + verb + 过 (keep 过)
English equivalent	I ate, she bought, he drank	I have been, she has tried, he has seen
Focus	The event itself	Whether the experience exists

Side by side:

• 我吃了北京烤鸭。(Wǒ chī le Běijīng kǎoyā: I ate Peking Duck. – specific meal, recently or as a specific event)
• 我吃过北京烤鸭。(Wǒ chī guo Běijīng kǎoyā: I have eaten Peking Duck before. – experience in my life)

The first sentence might come up if someone asks what you ate for lunch. The second comes up if someone asks whether you have tried Peking Duck.

Practice this distinction by describing your own experiences. Start with something you did today (use 了), then shift to asking whether you’ve ever tried something (use 过). Get feedback from a Chinese teacher on whether you’re choosing the right form for each situation.

Time markers and aspect markers together

Time markers and aspect markers can appear in the same sentence:

• 昨天我去了图书馆。(Zuótiān wǒ qù le túshūguǎn: Yesterday I went to the library.) – time marker + 了
• 我以前去过那家餐厅。(Wǒ yǐqián qù guo nà jiā cāntīng: I have been to that restaurant before.) – time marker + 过

The past tense system in Chinese is one of those areas where knowing the rule gives you the map, but you need to see it in enough real sentences for the pattern to feel natural. With tutors across 150+ languages on italki, finding a Chinese teacher ready to drill past tense through conversation is straightforward. Book a trial lesson today.

FAQ

Why do Chinese learners often overuse 了 (le)?

Learners frequently attach 了 to every verb in a past-tense sentence because they are trying to apply a past tense rule that does not exist. 了 marks completion, not time. State verbs (know, like, want, be) do not typically take 了 because states are not completed actions. 我知道了 (wǒ zhīdào le) means I now know / I got it (a state that has just been established), not simply I knew. Overusing 了 sounds unnatural because it implies completion where none is intended.

Can a Chinese sentence about the past have neither 了 nor 过?

Absolutely. If a time word like 昨天 (yesterday) or 去年 (last year) makes the past clear, no aspect marker is needed. For habitual or ongoing past actions (when I was a child, I used to…), Chinese uses 以前 or 小时候 without 了 or 过 because there is no single completed event. State verbs (love, think, know) in past contexts also typically appear without aspect markers: 我小时候喜欢跑步 (wǒ xiǎoshíhòu xǐhuān pǎobù: I liked running as a child) – no 了, just the time marker.

How do I say I used to… in Chinese?

The concept of used to (habitual past action that no longer happens) is expressed in Chinese with 以前 (yǐqián: before/in the past) + present-tense verb, sometimes followed by 但是现在不… (dànshì xiànzài bù: but now I don’t…): 我以前喜欢吃辣，但是现在不喜欢了 (I used to like eating spicy food, but now I don’t anymore). The structure does not use 了 or 过; it uses time contrast to convey change.