The principle: the verb plus its outcome

Many Mandarin verbs describe an attempt, and a second morpheme glued on the back reports whether the attempt succeeded and how. The pattern is:

verb + result morpheme

The two fuse into a single unit. The first part is the action; the second part is the result.

• 看见 (kàn jiàn) - look + perceive = to see (and actually perceive it)
• 听懂 (tīng dǒng) - listen + understand = to understand by listening
• 吃完 (chī wán) - eat + finish = to finish eating
• 找到 (zhǎo dào) - look for + reach = to find
• 学会 (xué huì) - study + be able = to learn (to the point of mastery)
• 做好 (zuò hǎo) - do + good/ready = to finish doing (well, to completion)
• 写错 (xiě cuò) - write + wrong = to write wrongly
• 看完 (kàn wán) - read + finish = to finish reading

The bare verb says you did the action; the complement says how it came out. 我找 means 'I look for'; 我找到 means 'I find'.

The common result morphemes

A small set of morphemes does most of the work. Learn these and you can decode most resultatives on sight.

Many of these are themselves ordinary words (好 'good', 完 'finish', 到 'arrive'), but as complements they report the outcome of the main verb rather than standing alone.

见 vs 到: see versus succeed-in-seeing

听见 and 听到 both mean 'hear', and 看见 and 看到 both mean 'see'. The difference is slight. 见 emphasises the bare fact of perception; 到 emphasises that the action reached its target, that you SUCCEEDED in perceiving. In practice they are often interchangeable for the senses.

• 我听见有人敲门。 (Wǒ tīng jiàn yǒu rén qiāo mén.) - I heard someone knocking.
• 我听到一个好消息。 (Wǒ tīng dào yí ge hǎo xiāo xi.) - I heard a piece of good news.
• 我看见他了。 (Wǒ kàn jiàn tā le.) - I saw him.
• 我看到那篇文章了。 (Wǒ kàn dào nà piān wén zhāng le.) - I saw / came across that article.

到 is the more general 'attain' morpheme and works far beyond the senses (找到 find, 买到 manage to buy, 收到 receive). 见 is largely restricted to seeing and hearing.

了 follows the whole unit

Because the verb and its result are one fused unit, the aspect 了 attaches AFTER the complement, not in the middle. You never split them.

• 我吃完了。 (Wǒ chī wán le.) - I've finished eating. (了 after 完, not 我吃了完.)
• 他找到了钥匙。 (Tā zhǎo dào le yào shi.) - He found the keys.
• 我看完了那本书。 (Wǒ kàn wán le nà běn shū.) - I finished reading that book.
• 我学会了游泳。 (Wǒ xué huì le yóu yǒng.) - I've learnt to swim.

Treat verb-plus-complement as if it were a single longer verb. Everything that would follow a plain verb - 了, the object - follows the complete unit. This is the same logic that makes 把 and 被 demand a 'completed' verb: the complement IS the completion. See aspect markers for how 了 behaves.

Negation uses 没, not 不

This catches everyone. To say the result did NOT happen, use 没 (méi) before the whole verb-complement unit, never 不.

• 我没看见他。 (Wǒ méi kàn jiàn tā.) - I didn't see him.
• 我没听懂。 (Wǒ méi tīng dǒng.) - I didn't understand (what was said).
• 我没吃完。 (Wǒ méi chī wán.) - I didn't finish eating.
• 他没找到钥匙。 (Tā méi zhǎo dào yào shi.) - He didn't find the keys.

The reason: a resultative reports an outcome, and saying the outcome failed to happen is a statement about a non-result in reality, which is exactly 没's job. 不 negates willingness, habit, or general truths, none of which fit here. ✗ 我不看见 is simply wrong. And as always with 没, the 了 drops: 没看见, not 没看见了.

The question form

To ask whether the result happened, Mandarin offers two natural shapes.

Shape 1: V-result + 了 + 没有 (tag the negative on the end)

• 你做完了没有？ (Nǐ zuò wán le méi yǒu?) - Have you finished?
• 你找到了没有？ (Nǐ zhǎo dào le méi yǒu?) - Did you find it?
• 你听懂了没？ (Nǐ tīng dǒng le méi?) - Did you get it? (没有 often shortens to 没.)

Shape 2: plain 吗 question

• 你做完了吗？ (Nǐ zuò wán le ma?) - Have you finished?
• 你听懂了吗？ (Nǐ tīng dǒng le ma?) - Did you understand?

Both are common. The 了没有 form is the verb-not-verb question applied to the result, and it feels a touch more direct. The answer comes back as the verb-complement (做完了 - finished) or its negative (没做完 - haven't finished).

A brief contrast with potential complements

There is a closely related pattern that this page does NOT cover in full: the potential complement. Slot 得 (de) or 不 (bù) BETWEEN the verb and the result morpheme and you stop reporting what happened and start talking about what is POSSIBLE.

• 看见 (kàn jiàn) - saw (actual result) versus 看得见 (kàn de jiàn) - can see / able to make out, and 看不见 (kàn bu jiàn) - cannot see.
• 听懂 (tīng dǒng) - understood versus 听得懂 (tīng de dǒng) - can understand and 听不懂 (tīng bu dǒng) - cannot understand.
• 吃完 (chī wán) - finished eating versus 吃不完 (chī bu wán) - cannot finish (too much food).

Notice the negative potential 看不见 is NOT the same as the resultative negative 没看见. 没看见 means 'didn't see' (it didn't happen); 看不见 means 'can't see' (it's not possible). They are different patterns with different jobs, and the potential complement is a separate topic for later study. For now, just register that sliding 得 or 不 into the middle switches you from result to possibility.

Worked examples

• 这本书我已经看完了。 (Zhè běn shū wǒ yǐ jīng kàn wán le.) - I've already finished reading this book.
• 你说的话我没听懂。 (Nǐ shuō de huà wǒ méi tīng dǒng.) - I didn't understand what you said.
• 我终于找到工作了。 (Wǒ zhōng yú zhǎo dào gōng zuò le.) - I finally found a job.
• 名字你写错了。 (Míng zi nǐ xiě cuò le.) - You wrote the name wrongly.
• 作业做完了没有？ (Zuò yè zuò wán le méi yǒu?) - Have you finished your homework?
• 我记住了他的电话号码。 (Wǒ jì zhù le tā de diàn huà hào mǎ.) - I've memorised his phone number.
• 请把垃圾扔掉。 (Qǐng bǎ lā jī rēng diào.) - Please throw the rubbish away.

Common mistakes

1. Using a bare verb where a result is meant. 我找钥匙 is 'I'm looking for the keys'; to say you FOUND them you must add 到 - 我找到钥匙了.
2. Putting 了 inside the unit. ✗ 我吃了完. The 了 goes after the whole thing: 我吃完了.
3. Negating with 不. ✗ 我不看见. A failed result takes 没: 我没看见.
4. Leaving 了 in after 没. ✗ 没听懂了. The 了 drops: 没听懂.
5. Confusing 没看见 with 看不见. The first is 'didn't see' (result); the second is 'can't see' (possibility, a potential complement).

What to drill

1. Learn the result-morpheme set cold. 完/好/到/见/懂/会/错/对/成/住/掉 unlock most resultatives on sight.
2. Treat verb + result as one word. 了 and the object follow the complete unit.
3. Negate with 没, drop the 了. 没看完, never 不看完 or 没看完了.
4. Ask with 了没有. 做完了没有？ is the everyday question shape.
5. Keep result and potential apart. 没V-result = didn't; V不result = can't.

For how the completion 了 behaves, see aspect markers. For why 把 and 被 both demand a completed verb that a resultative neatly supplies, see the 把 construction and the 被 passive. For the wider family of verb endings, see complements.