In Chinese grammar, adverbial particles, also known as "副词性小品词" (fùcí xìng xiǎo pǐn cí) or simply "副词" (fùcí), are a type of word that functions as an adverb to modify the meaning of a verb, adjective, or another adverb. Adverbial particles play an important role in expressing various aspects such as time, location, manner, degree, and more.

Here are some common Chinese adverbial particles:

1. 了 (le): Indicates a completed action or a change in state.

   Example: 他吃了饭 (Tā chī le fàn) - He has eaten.

2. 很 (hěn): Indicates degree, similar to "very" in English.

   Example: 这个问题很难 (Zhège wèntí hěn nán) - This question is very difficult.

3. 不 (bù) / 没 (méi): Negates the verb.

   Example: 我不知道 (Wǒ bù zhīdào) - I don't know.

4. 就 (jiù): Indicates immediacy or earliness.

   Example: 他就来了 (Tā jiù lái le) - He has come already.

5. 都 (dōu): Indicates "all" or "both" when used with plural nouns.

   Example: 我们都喜欢音乐 (Wǒmen dōu xǐhuān yīnyuè) - We all like music.

6. 会 (huì): Indicates capability or possibility.

   Example: 我会游泳 (Wǒ huì yóuyǒng) - I can swim.

7. 着 (zhe): Indicates the continuation of an action.

   Example: 他正在工作 (Tā zhèngzài gōngzuò) - He is working.

8. 过 (guò): Indicates the experience of an action.

   Example: 我吃过中国菜 (Wǒ chī guò Zhōngguó cài) - I have eaten Chinese food.

9. 也 (yě): Means "also" or "too."

   Example: 我也喜欢这部电影 (Wǒ yě xǐhuān zhè bù diànyǐng) - I also like this movie.

These are just a few examples, and there are many more adverbial particles in Chinese that serve various functions in sentence structure and meaning. Understanding how to use these particles is crucial for constructing grammatically correct and contextually appropriate sentences in Chinese.