光 vs 只: what is the difference?
Both mean only. 光 is more spoken and often suggests complaint, as in 他光说不做. 只 is neutral and can go before almost any verb or number.
| Word | Pinyin | What it does | Structure |
|---|---|---|---|
| 光 | guāng | Means only in speech, often with a note of dissatisfaction. | 光 + verb / noun |
| 只 | zhǐ | Means 'only' in a neutral way and fits almost any verb or number. | 只 + Verb / Number |
光 (guāng)
Means only in speech, often with a note of dissatisfaction.
Structure: 光 + verb / noun
| Chinese | Pinyin | English |
|---|---|---|
| 他光吃肉，不吃蔬菜。 | Tā guāng chī ròu, bù chī shū cài. | He only eats meat and does not eat vegetables. |
| 别光看，你也动手试一试。 | Bié guāng kàn, nǐ yě dòng shǒu shì yí shì. | Do not just watch, try it with your own hands too. |
| 光靠运气是不够的。 | Guāng kào yùn qì shì bú gòu de. | Luck alone is not enough. |
Not: 他吃光肉，不吃菜。 光 meaning only goes before the verb; after a verb it means used up.
只 (zhǐ)
Means 'only' in a neutral way and fits almost any verb or number.
Structure: 只 + Verb / Number
| Chinese | Pinyin | English |
|---|---|---|
| 我只有一个哥哥。 | Wǒ zhǐ yǒu yí gè gē ge. | I only have one older brother. |
| 教室里只有三个人。 | Jiào shì lǐ zhǐ yǒu sān gè rén. | There are only three people in the classroom. |
| 我今天只吃了一个面包。 | Wǒ jīn tiān zhǐ chī le yí gè miàn bāo. | I only ate one bread roll today. |
Not: 我吃了只一个面包。 只 goes before the word it limits: 我只吃了一个面包。
Where this comes from
The comparison is part of Scope Adverbs: 光, 仅, 就, 至少 (HSK 3) and Scope adverbs: 共/全/光/仅/至少 (HSK 4) in the grammar reference, which has the full explanation, more worked examples, and what to learn before and after it.
More pairs: 才 vs 就 · 朝 vs 向 · 从 vs 自从 · 大概 vs 恐怕 · 得很 vs 极了 · 互相 vs 相互 · 叫 vs 让 · 每 vs 各 · 听不懂 vs 没听懂 · 需要 vs 要 · 因为 vs 为了 · 只有…才 vs 只要…就 · all 81 pairs.
Frequently asked questions
What is the difference between 光 and 只?
Both mean only. 光 is more spoken and often suggests complaint, as in 他光说不做. 只 is neutral and can go before almost any verb or number.
What is the difference between 光 and 只?
只 is neutral. 光 often carries criticism: 光说不做 means "all talk and no action". Use 只 when you simply state a limit, like 我只喝了一杯.
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